/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-bad/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:06:55,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:06:55,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:06:55,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 16:06:55,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 16:06:55,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 16:06:55,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 16:06:55,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 16:06:55,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 16:06:55,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 16:06:55,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 16:06:55,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 16:06:55,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:06:55,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:06:55,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:06:55,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:06:55,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:06:55,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:06:55,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:06:55,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:06:55,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:06:55,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:06:55,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:06:55,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:06:55,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 16:06:55,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 16:06:55,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 16:06:55,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 16:06:55,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 16:06:55,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 16:06:55,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 16:06:55,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 16:06:55,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 16:06:55,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 16:06:55,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 16:06:55,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 16:06:55,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 16:06:55,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 16:06:55,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:06:55,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:06:55,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:06:55,844 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 16:06:55,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:06:55,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:06:55,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:06:55,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:06:55,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:06:55,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:06:55,861 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:06:55,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:06:55,861 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:06:55,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:06:55,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:06:55,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:06:55,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:06:55,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:06:55,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:06:55,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:06:55,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:06:55,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:06:55,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:06:55,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:06:55,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:06:55,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:06:55,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:06:56,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:06:56,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:06:56,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:06:56,110 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:06:56,111 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:06:56,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl [2021-05-03 16:06:56,112 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-05-03 16:06:56,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:06:56,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:06:56,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:06:56,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:06:56,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:06:56,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:06:56,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:06:56,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:06:56,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:06:56,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... [2021-05-03 16:06:56,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:06:56,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:06:56,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:06:56,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:06:56,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:06:56,253 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:06:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:06:56,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:06:56,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:06:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:06:56,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:06:56,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:06:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:06:56,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:06:56,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:06:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:06:56,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:06:56,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 16:06:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 16:06:56,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 16:06:56,255 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 16:06:56,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:06:56,718 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-03 16:06:56,721 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 16:06:56,722 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-03 16:06:56,722 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-03 16:06:56,722 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-05-03 16:06:56,723 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:06:56 BoogieIcfgContainer [2021-05-03 16:06:56,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:06:56,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:06:56,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:06:56,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:06:56,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:06:56" (1/2) ... [2021-05-03 16:06:56,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc9b3de and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:06:56, skipping insertion in model container [2021-05-03 16:06:56,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:06:56" (2/2) ... [2021-05-03 16:06:56,728 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-05-03 16:06:56,732 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:06:56,732 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:06:56,735 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:06:56,735 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:06:56,759 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 16:06:56,770 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 16:06:56,782 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:06:56,782 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:06:56,782 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:06:56,782 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:06:56,783 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:06:56,783 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:06:56,783 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:06:56,783 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:06:56,788 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-05-03 16:06:56,800 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:06:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:06:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 16:06:56,809 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:56,809 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:56,809 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:56,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-05-03 16:06:56,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:56,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925526915] [2021-05-03 16:06:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:56,933 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 16:06:56,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925526915] [2021-05-03 16:06:56,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:06:56,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:06:56,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946218765] [2021-05-03 16:06:56,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:06:56,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:56,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:06:56,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:06:56,954 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 16:06:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:56,993 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-05-03 16:06:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:06:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 16:06:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:57,003 INFO L225 Difference]: With dead ends: 94 [2021-05-03 16:06:57,003 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 16:06:57,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:06:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 16:06:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-03 16:06:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.5454545454545454) internal successors, (312), 88 states have internal predecessors, (312), 0 states have call successors, (0), 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 16:06:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-05-03 16:06:57,032 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-05-03 16:06:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:57,032 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-05-03 16:06:57,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 16:06:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-05-03 16:06:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 16:06:57,033 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:57,034 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:57,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:06:57,034 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-05-03 16:06:57,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:57,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759894538] [2021-05-03 16:06:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:57,084 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 16:06:57,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759894538] [2021-05-03 16:06:57,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342603160] [2021-05-03 16:06:57,085 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 16:06:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:57,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:06:57,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:57,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:57,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-05-03 16:06:57,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058182010] [2021-05-03 16:06:57,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:06:57,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:57,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:06:57,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:06:57,258 INFO L87 Difference]: Start difference. First operand 89 states and 312 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 16:06:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:57,287 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-05-03 16:06:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:06:57,287 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 16 [2021-05-03 16:06:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:57,291 INFO L225 Difference]: With dead ends: 120 [2021-05-03 16:06:57,291 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 16:06:57,291 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:06:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 16:06:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-05-03 16:06:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 3.5542168674698793) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 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 16:06:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-05-03 16:06:57,308 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-05-03 16:06:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:57,308 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-05-03 16:06:57,308 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 16:06:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-05-03 16:06:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 16:06:57,309 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:57,309 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:57,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 16:06:57,511 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-05-03 16:06:57,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:57,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172079491] [2021-05-03 16:06:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:57,594 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 16:06:57,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172079491] [2021-05-03 16:06:57,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:06:57,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:06:57,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377360196] [2021-05-03 16:06:57,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:06:57,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:57,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:06:57,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:06:57,596 INFO L87 Difference]: Start difference. First operand 84 states and 295 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16:06:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:57,601 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-05-03 16:06:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:06:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-05-03 16:06:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:57,603 INFO L225 Difference]: With dead ends: 129 [2021-05-03 16:06:57,603 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 16:06:57,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:06:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 16:06:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-05-03 16:06:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 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 16:06:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-05-03 16:06:57,609 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-05-03 16:06:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:57,609 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-05-03 16:06:57,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16:06:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-05-03 16:06:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 16:06:57,610 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:57,610 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:57,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:06:57,611 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-05-03 16:06:57,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:57,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215320232] [2021-05-03 16:06:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:57,628 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 16:06:57,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215320232] [2021-05-03 16:06:57,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:06:57,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:06:57,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902895445] [2021-05-03 16:06:57,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:06:57,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:06:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:06:57,630 INFO L87 Difference]: Start difference. First operand 98 states and 337 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16:06:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:57,635 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-05-03 16:06:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:06:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-05-03 16:06:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:57,636 INFO L225 Difference]: With dead ends: 76 [2021-05-03 16:06:57,637 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 16:06:57,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:06:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 16:06:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-03 16:06:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 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 16:06:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-05-03 16:06:57,640 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-05-03 16:06:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:57,640 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-05-03 16:06:57,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16:06:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-05-03 16:06:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 16:06:57,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:57,641 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:57,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 16:06:57,641 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:57,642 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-05-03 16:06:57,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:57,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421471950] [2021-05-03 16:06:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:57,667 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 16:06:57,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421471950] [2021-05-03 16:06:57,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835419919] [2021-05-03 16:06:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:06:57,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:57,792 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 16:06:57,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:57,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-05-03 16:06:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260816949] [2021-05-03 16:06:57,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:06:57,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:06:57,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:06:57,794 INFO L87 Difference]: Start difference. First operand 64 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 16:06:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:57,814 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-05-03 16:06:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:06:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 16 [2021-05-03 16:06:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:57,815 INFO L225 Difference]: With dead ends: 115 [2021-05-03 16:06:57,815 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 16:06:57,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:06:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 16:06:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-03 16:06:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 107 states have internal predecessors, (367), 0 states have call successors, (0), 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 16:06:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-05-03 16:06:57,820 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-05-03 16:06:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:57,820 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-05-03 16:06:57,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 16:06:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-05-03 16:06:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 16:06:57,823 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:57,823 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:58,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:58,033 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:58,034 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-05-03 16:06:58,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:58,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893534279] [2021-05-03 16:06:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:58,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893534279] [2021-05-03 16:06:58,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269381030] [2021-05-03 16:06:58,098 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 16:06:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:58,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:06:58,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:58,163 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 16:06:58,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:06:58,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-05-03 16:06:58,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501463447] [2021-05-03 16:06:58,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:06:58,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:58,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:06:58,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:06:58,164 INFO L87 Difference]: Start difference. First operand 108 states and 367 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 16:06:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:58,171 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-05-03 16:06:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:06:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-05-03 16:06:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:58,172 INFO L225 Difference]: With dead ends: 57 [2021-05-03 16:06:58,172 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 16:06:58,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:06:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 16:06:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-03 16:06:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 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 16:06:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-05-03 16:06:58,174 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-05-03 16:06:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:58,174 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-05-03 16:06:58,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 16:06:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-05-03 16:06:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 16:06:58,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:58,175 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:58,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:58,391 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-05-03 16:06:58,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:58,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668990603] [2021-05-03 16:06:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:58,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668990603] [2021-05-03 16:06:58,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198663914] [2021-05-03 16:06:58,439 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 16:06:58,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:06:58,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:06:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:58,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:58,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-03 16:06:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814270909] [2021-05-03 16:06:58,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:06:58,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:06:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:06:58,550 INFO L87 Difference]: Start difference. First operand 54 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 16:06:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:58,595 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-05-03 16:06:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:06:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 17 [2021-05-03 16:06:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:58,596 INFO L225 Difference]: With dead ends: 93 [2021-05-03 16:06:58,596 INFO L226 Difference]: Without dead ends: 88 [2021-05-03 16:06:58,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:06:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-03 16:06:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-03 16:06:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 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 16:06:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-05-03 16:06:58,607 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-05-03 16:06:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:58,608 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-05-03 16:06:58,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 16:06:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-05-03 16:06:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:06:58,609 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:58,609 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:58,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:58,824 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-05-03 16:06:58,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:58,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531358405] [2021-05-03 16:06:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531358405] [2021-05-03 16:06:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022337329] [2021-05-03 16:06:58,894 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 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 16:06:58,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:06:58,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:06:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:59,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:59,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-03 16:06:59,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391404914] [2021-05-03 16:06:59,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:06:59,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:06:59,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:06:59,169 INFO L87 Difference]: Start difference. First operand 87 states and 283 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:59,272 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-05-03 16:06:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:06:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 16:06:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:59,274 INFO L225 Difference]: With dead ends: 144 [2021-05-03 16:06:59,274 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 16:06:59,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:06:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 16:06:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-05-03 16:06:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.5238095238095237) internal successors, (370), 105 states have internal predecessors, (370), 0 states have call successors, (0), 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 16:06:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-05-03 16:06:59,278 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-05-03 16:06:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:59,278 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-05-03 16:06:59,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-05-03 16:06:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:06:59,279 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:59,279 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:59,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:59,492 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:59,492 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-05-03 16:06:59,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:59,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377486971] [2021-05-03 16:06:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:59,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377486971] [2021-05-03 16:06:59,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353904943] [2021-05-03 16:06:59,570 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 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 16:06:59,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:06:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:06:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:59,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:59,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 16:06:59,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374366707] [2021-05-03 16:06:59,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:06:59,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:59,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:06:59,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:06:59,671 INFO L87 Difference]: Start difference. First operand 106 states and 370 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 16:06:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:59,708 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-05-03 16:06:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:06:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 18 [2021-05-03 16:06:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:59,710 INFO L225 Difference]: With dead ends: 179 [2021-05-03 16:06:59,710 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 16:06:59,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:06:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 16:06:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-05-03 16:06:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.7196969696969697) internal successors, (491), 132 states have internal predecessors, (491), 0 states have call successors, (0), 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 16:06:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-05-03 16:06:59,714 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-05-03 16:06:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:59,714 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-05-03 16:06:59,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 16:06:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-05-03 16:06:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:06:59,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:59,715 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:59,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:59,931 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-05-03 16:06:59,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:59,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685177282] [2021-05-03 16:06:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:59,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685177282] [2021-05-03 16:06:59,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298718939] [2021-05-03 16:06:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:06:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:06:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:00,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:00,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-05-03 16:07:00,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735548998] [2021-05-03 16:07:00,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:07:00,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:00,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:07:00,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:07:00,140 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:00,237 INFO L93 Difference]: Finished difference Result 260 states and 963 transitions. [2021-05-03 16:07:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:07:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 16:07:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:00,239 INFO L225 Difference]: With dead ends: 260 [2021-05-03 16:07:00,239 INFO L226 Difference]: Without dead ends: 249 [2021-05-03 16:07:00,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:07:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-03 16:07:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 174. [2021-05-03 16:07:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 4.005780346820809) internal successors, (693), 173 states have internal predecessors, (693), 0 states have call successors, (0), 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 16:07:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 693 transitions. [2021-05-03 16:07:00,247 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 693 transitions. Word has length 18 [2021-05-03 16:07:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:00,248 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 693 transitions. [2021-05-03 16:07:00,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 693 transitions. [2021-05-03 16:07:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:07:00,248 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:00,248 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:00,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:00,465 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:00,465 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-05-03 16:07:00,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:00,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534663645] [2021-05-03 16:07:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534663645] [2021-05-03 16:07:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969522939] [2021-05-03 16:07:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:07:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:07:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:00,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:00,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-05-03 16:07:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635778883] [2021-05-03 16:07:00,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:07:00,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:00,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:07:00,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:07:00,679 INFO L87 Difference]: Start difference. First operand 174 states and 693 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:07:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:00,737 INFO L93 Difference]: Finished difference Result 176 states and 684 transitions. [2021-05-03 16:07:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:07:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 18 [2021-05-03 16:07:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:00,738 INFO L225 Difference]: With dead ends: 176 [2021-05-03 16:07:00,738 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 16:07:00,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:07:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 16:07:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-05-03 16:07:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 4.0) internal successors, (668), 167 states have internal predecessors, (668), 0 states have call successors, (0), 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 16:07:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 668 transitions. [2021-05-03 16:07:00,743 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 668 transitions. Word has length 18 [2021-05-03 16:07:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:00,743 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 668 transitions. [2021-05-03 16:07:00,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:07:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 668 transitions. [2021-05-03 16:07:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 16:07:00,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:00,744 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:00,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 16:07:00,960 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-05-03 16:07:00,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:00,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652303055] [2021-05-03 16:07:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:01,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652303055] [2021-05-03 16:07:01,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527067810] [2021-05-03 16:07:01,013 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 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 16:07:01,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:07:01,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:01,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:07:01,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:01,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:01,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-05-03 16:07:01,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513946336] [2021-05-03 16:07:01,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:07:01,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:01,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:07:01,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:07:01,291 INFO L87 Difference]: Start difference. First operand 168 states and 668 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:01,497 INFO L93 Difference]: Finished difference Result 377 states and 1547 transitions. [2021-05-03 16:07:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:07:01,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 16:07:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:01,500 INFO L225 Difference]: With dead ends: 377 [2021-05-03 16:07:01,500 INFO L226 Difference]: Without dead ends: 372 [2021-05-03 16:07:01,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:07:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-03 16:07:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 222. [2021-05-03 16:07:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 4.398190045248869) internal successors, (972), 221 states have internal predecessors, (972), 0 states have call successors, (0), 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 16:07:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 972 transitions. [2021-05-03 16:07:01,508 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 972 transitions. Word has length 19 [2021-05-03 16:07:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:01,508 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 972 transitions. [2021-05-03 16:07:01,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 972 transitions. [2021-05-03 16:07:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:07:01,509 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:01,509 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:01,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 16:07:01,725 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-05-03 16:07:01,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:01,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629993339] [2021-05-03 16:07:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629993339] [2021-05-03 16:07:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527428305] [2021-05-03 16:07:01,795 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 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 16:07:01,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:07:01,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:07:01,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:01,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:01,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:01,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:01,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-05-03 16:07:01,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-05-03 16:07:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:02,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:02,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-03 16:07:02,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135976356] [2021-05-03 16:07:02,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:07:02,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:07:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:07:02,048 INFO L87 Difference]: Start difference. First operand 222 states and 972 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:02,190 INFO L93 Difference]: Finished difference Result 416 states and 1719 transitions. [2021-05-03 16:07:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:07:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2021-05-03 16:07:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:02,193 INFO L225 Difference]: With dead ends: 416 [2021-05-03 16:07:02,193 INFO L226 Difference]: Without dead ends: 407 [2021-05-03 16:07:02,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-03 16:07:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 260. [2021-05-03 16:07:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 4.463320463320463) internal successors, (1156), 259 states have internal predecessors, (1156), 0 states have call successors, (0), 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 16:07:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1156 transitions. [2021-05-03 16:07:02,202 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1156 transitions. Word has length 20 [2021-05-03 16:07:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:02,202 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 1156 transitions. [2021-05-03 16:07:02,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1156 transitions. [2021-05-03 16:07:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:07:02,203 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:02,203 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:02,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:02,417 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:02,417 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-05-03 16:07:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:02,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057654874] [2021-05-03 16:07:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:02,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057654874] [2021-05-03 16:07:02,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003498573] [2021-05-03 16:07:02,499 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 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 16:07:02,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:07:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:02,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 16:07:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:02,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:02,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-03 16:07:02,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622110444] [2021-05-03 16:07:02,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:07:02,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:02,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:07:02,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:07:02,634 INFO L87 Difference]: Start difference. First operand 260 states and 1156 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:02,705 INFO L93 Difference]: Finished difference Result 287 states and 1222 transitions. [2021-05-03 16:07:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:07:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2021-05-03 16:07:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:02,707 INFO L225 Difference]: With dead ends: 287 [2021-05-03 16:07:02,707 INFO L226 Difference]: Without dead ends: 283 [2021-05-03 16:07:02,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:07:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-03 16:07:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 260. [2021-05-03 16:07:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 4.413127413127413) internal successors, (1143), 259 states have internal predecessors, (1143), 0 states have call successors, (0), 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 16:07:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1143 transitions. [2021-05-03 16:07:02,713 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1143 transitions. Word has length 20 [2021-05-03 16:07:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:02,713 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 1143 transitions. [2021-05-03 16:07:02,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1143 transitions. [2021-05-03 16:07:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:07:02,732 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:02,732 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:02,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 16:07:02,940 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:02,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:02,941 INFO L82 PathProgramCache]: Analyzing trace with hash -257751127, now seen corresponding path program 2 times [2021-05-03 16:07:02,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:02,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557349979] [2021-05-03 16:07:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:03,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557349979] [2021-05-03 16:07:03,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266628871] [2021-05-03 16:07:03,011 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 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 16:07:03,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:07:03,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:03,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 16:07:03,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:03,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:03,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:03,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:03,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:03,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:03,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-05-03 16:07:03,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-05-03 16:07:03,236 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 16:07:03,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:03,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 16:07:03,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961797487] [2021-05-03 16:07:03,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:07:03,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:03,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:07:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:07:03,238 INFO L87 Difference]: Start difference. First operand 260 states and 1143 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:03,431 INFO L93 Difference]: Finished difference Result 456 states and 1883 transitions. [2021-05-03 16:07:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:07:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2021-05-03 16:07:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:03,434 INFO L225 Difference]: With dead ends: 456 [2021-05-03 16:07:03,434 INFO L226 Difference]: Without dead ends: 445 [2021-05-03 16:07:03,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:07:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-05-03 16:07:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-05-03 16:07:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 4.489583333333333) internal successors, (1293), 288 states have internal predecessors, (1293), 0 states have call successors, (0), 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 16:07:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 1293 transitions. [2021-05-03 16:07:03,443 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 1293 transitions. Word has length 20 [2021-05-03 16:07:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:03,443 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 1293 transitions. [2021-05-03 16:07:03,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 1293 transitions. [2021-05-03 16:07:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:07:03,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:03,444 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:03,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:03,657 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-05-03 16:07:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:03,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269499905] [2021-05-03 16:07:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:03,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269499905] [2021-05-03 16:07:03,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37795298] [2021-05-03 16:07:03,714 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 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 16:07:03,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:07:03,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:03,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 16:07:03,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:03,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:03,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 16:07:03,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871123901] [2021-05-03 16:07:03,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:07:03,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:07:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:07:03,985 INFO L87 Difference]: Start difference. First operand 289 states and 1293 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:04,179 INFO L93 Difference]: Finished difference Result 536 states and 2256 transitions. [2021-05-03 16:07:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 16:07:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:04,182 INFO L225 Difference]: With dead ends: 536 [2021-05-03 16:07:04,182 INFO L226 Difference]: Without dead ends: 531 [2021-05-03 16:07:04,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-05-03 16:07:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 316. [2021-05-03 16:07:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 4.584126984126984) internal successors, (1444), 315 states have internal predecessors, (1444), 0 states have call successors, (0), 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 16:07:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1444 transitions. [2021-05-03 16:07:04,192 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1444 transitions. Word has length 20 [2021-05-03 16:07:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:04,192 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 1444 transitions. [2021-05-03 16:07:04,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1444 transitions. [2021-05-03 16:07:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:07:04,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:04,194 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:04,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 16:07:04,409 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-05-03 16:07:04,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:04,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993926948] [2021-05-03 16:07:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993926948] [2021-05-03 16:07:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852881779] [2021-05-03 16:07:04,554 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 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 16:07:04,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:07:04,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:07:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:04,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:04,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-03 16:07:04,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594558076] [2021-05-03 16:07:04,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:07:04,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:07:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:07:04,708 INFO L87 Difference]: Start difference. First operand 316 states and 1444 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:04,915 INFO L93 Difference]: Finished difference Result 445 states and 1897 transitions. [2021-05-03 16:07:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 16:07:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:04,918 INFO L225 Difference]: With dead ends: 445 [2021-05-03 16:07:04,918 INFO L226 Difference]: Without dead ends: 435 [2021-05-03 16:07:04,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-05-03 16:07:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-05-03 16:07:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 4.604790419161676) internal successors, (1538), 334 states have internal predecessors, (1538), 0 states have call successors, (0), 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 16:07:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1538 transitions. [2021-05-03 16:07:04,930 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1538 transitions. Word has length 20 [2021-05-03 16:07:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:04,930 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 1538 transitions. [2021-05-03 16:07:04,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1538 transitions. [2021-05-03 16:07:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:07:04,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:04,931 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:05,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:05,151 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-05-03 16:07:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:05,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627737840] [2021-05-03 16:07:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:05,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627737840] [2021-05-03 16:07:05,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397616268] [2021-05-03 16:07:05,243 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 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 16:07:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:07:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:05,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:05,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:05,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:05,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:05,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:05,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:05,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:05,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:05,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-05-03 16:07:05,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-05-03 16:07:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:05,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:05,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 16:07:05,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439800950] [2021-05-03 16:07:05,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:07:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:07:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:07:05,528 INFO L87 Difference]: Start difference. First operand 335 states and 1538 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:05,702 INFO L93 Difference]: Finished difference Result 466 states and 1917 transitions. [2021-05-03 16:07:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:07:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:07:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:05,705 INFO L225 Difference]: With dead ends: 466 [2021-05-03 16:07:05,705 INFO L226 Difference]: Without dead ends: 452 [2021-05-03 16:07:05,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-03 16:07:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 368. [2021-05-03 16:07:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 4.405994550408719) internal successors, (1617), 367 states have internal predecessors, (1617), 0 states have call successors, (0), 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 16:07:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1617 transitions. [2021-05-03 16:07:05,715 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1617 transitions. Word has length 21 [2021-05-03 16:07:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:05,715 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1617 transitions. [2021-05-03 16:07:05,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1617 transitions. [2021-05-03 16:07:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:07:05,716 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:05,716 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:05,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:05,932 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 3 times [2021-05-03 16:07:05,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:05,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975321256] [2021-05-03 16:07:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:06,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975321256] [2021-05-03 16:07:06,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260530265] [2021-05-03 16:07:06,006 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 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 16:07:06,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:07:06,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:06,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:06,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:06,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-03 16:07:06,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534623283] [2021-05-03 16:07:06,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:07:06,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:07:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:07:06,232 INFO L87 Difference]: Start difference. First operand 368 states and 1617 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:06,405 INFO L93 Difference]: Finished difference Result 398 states and 1680 transitions. [2021-05-03 16:07:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:07:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:07:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:06,408 INFO L225 Difference]: With dead ends: 398 [2021-05-03 16:07:06,408 INFO L226 Difference]: Without dead ends: 396 [2021-05-03 16:07:06,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-03 16:07:06,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 372. [2021-05-03 16:07:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 4.380053908355795) internal successors, (1625), 371 states have internal predecessors, (1625), 0 states have call successors, (0), 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 16:07:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1625 transitions. [2021-05-03 16:07:06,419 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1625 transitions. Word has length 21 [2021-05-03 16:07:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:06,419 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1625 transitions. [2021-05-03 16:07:06,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1625 transitions. [2021-05-03 16:07:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:07:06,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:06,420 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:06,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:06,636 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-05-03 16:07:06,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:06,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943056651] [2021-05-03 16:07:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:06,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943056651] [2021-05-03 16:07:06,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937145288] [2021-05-03 16:07:06,685 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 16:07:06,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:07:06,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:06,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 16:07:06,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:06,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:06,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-05-03 16:07:06,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547993351] [2021-05-03 16:07:06,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:07:06,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:07:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:07:06,909 INFO L87 Difference]: Start difference. First operand 372 states and 1625 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:07,051 INFO L93 Difference]: Finished difference Result 979 states and 4133 transitions. [2021-05-03 16:07:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:07:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:07,057 INFO L225 Difference]: With dead ends: 979 [2021-05-03 16:07:07,057 INFO L226 Difference]: Without dead ends: 963 [2021-05-03 16:07:07,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-05-03 16:07:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 612. [2021-05-03 16:07:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 4.718494271685761) internal successors, (2883), 611 states have internal predecessors, (2883), 0 states have call successors, (0), 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 16:07:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2883 transitions. [2021-05-03 16:07:07,076 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2883 transitions. Word has length 21 [2021-05-03 16:07:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:07,076 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2883 transitions. [2021-05-03 16:07:07,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2883 transitions. [2021-05-03 16:07:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:07:07,079 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:07,079 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:07,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 16:07:07,293 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 6 times [2021-05-03 16:07:07,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:07,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623275966] [2021-05-03 16:07:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:07,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623275966] [2021-05-03 16:07:07,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589951002] [2021-05-03 16:07:07,411 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 16:07:07,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:07:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:07,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:07:07,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:07,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:07,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:07,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:07,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:07,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-05-03 16:07:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:07,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:07,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 16:07:07,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457560806] [2021-05-03 16:07:07,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:07:07,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:07:07,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:07:07,628 INFO L87 Difference]: Start difference. First operand 612 states and 2883 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:07,739 INFO L93 Difference]: Finished difference Result 752 states and 3292 transitions. [2021-05-03 16:07:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:07,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:07:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:07,744 INFO L225 Difference]: With dead ends: 752 [2021-05-03 16:07:07,744 INFO L226 Difference]: Without dead ends: 747 [2021-05-03 16:07:07,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-05-03 16:07:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 612. [2021-05-03 16:07:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 4.723404255319149) internal successors, (2886), 611 states have internal predecessors, (2886), 0 states have call successors, (0), 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 16:07:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2886 transitions. [2021-05-03 16:07:07,761 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2886 transitions. Word has length 21 [2021-05-03 16:07:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:07,761 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2886 transitions. [2021-05-03 16:07:07,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2886 transitions. [2021-05-03 16:07:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:07:07,764 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:07,764 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:07,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 16:07:07,980 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:07,980 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 7 times [2021-05-03 16:07:07,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:07,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862947790] [2021-05-03 16:07:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:08,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862947790] [2021-05-03 16:07:08,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915278386] [2021-05-03 16:07:08,070 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 16:07:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:07:08,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:08,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:08,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:07:08,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22022231] [2021-05-03 16:07:08,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:07:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:07:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:07:08,288 INFO L87 Difference]: Start difference. First operand 612 states and 2886 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:08,378 INFO L93 Difference]: Finished difference Result 691 states and 3130 transitions. [2021-05-03 16:07:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:07:08,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:07:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:08,382 INFO L225 Difference]: With dead ends: 691 [2021-05-03 16:07:08,382 INFO L226 Difference]: Without dead ends: 686 [2021-05-03 16:07:08,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-05-03 16:07:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 618. [2021-05-03 16:07:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 4.72771474878444) internal successors, (2917), 617 states have internal predecessors, (2917), 0 states have call successors, (0), 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 16:07:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 2917 transitions. [2021-05-03 16:07:08,398 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 2917 transitions. Word has length 21 [2021-05-03 16:07:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:08,398 INFO L480 AbstractCegarLoop]: Abstraction has 618 states and 2917 transitions. [2021-05-03 16:07:08,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 2917 transitions. [2021-05-03 16:07:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:07:08,400 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:08,400 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:08,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 16:07:08,613 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-05-03 16:07:08,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:08,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846020465] [2021-05-03 16:07:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:08,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846020465] [2021-05-03 16:07:08,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253312992] [2021-05-03 16:07:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:07:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:07:08,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:08,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:08,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:07:08,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875788911] [2021-05-03 16:07:08,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:07:08,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:07:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:07:08,940 INFO L87 Difference]: Start difference. First operand 618 states and 2917 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:08,986 INFO L93 Difference]: Finished difference Result 608 states and 2803 transitions. [2021-05-03 16:07:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:07:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:07:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:08,998 INFO L225 Difference]: With dead ends: 608 [2021-05-03 16:07:08,998 INFO L226 Difference]: Without dead ends: 584 [2021-05-03 16:07:08,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:07:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-03 16:07:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2021-05-03 16:07:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 4.729776247848537) internal successors, (2748), 581 states have internal predecessors, (2748), 0 states have call successors, (0), 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 16:07:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2748 transitions. [2021-05-03 16:07:09,017 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2748 transitions. Word has length 21 [2021-05-03 16:07:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:09,018 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 2748 transitions. [2021-05-03 16:07:09,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2748 transitions. [2021-05-03 16:07:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:09,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:09,020 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:09,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 16:07:09,233 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1522007757, now seen corresponding path program 4 times [2021-05-03 16:07:09,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:09,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534344698] [2021-05-03 16:07:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:09,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534344698] [2021-05-03 16:07:09,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91925533] [2021-05-03 16:07:09,355 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 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 16:07:09,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:07:09,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:09,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:07:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:09,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:09,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:09,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:09,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:09,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-05-03 16:07:09,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-05-03 16:07:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:09,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:09,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-03 16:07:09,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026878439] [2021-05-03 16:07:09,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:07:09,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:07:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:07:09,696 INFO L87 Difference]: Start difference. First operand 582 states and 2748 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 16:07:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:09,943 INFO L93 Difference]: Finished difference Result 1630 states and 7471 transitions. [2021-05-03 16:07:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:07:09,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 16:07:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:09,952 INFO L225 Difference]: With dead ends: 1630 [2021-05-03 16:07:09,953 INFO L226 Difference]: Without dead ends: 1588 [2021-05-03 16:07:09,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-05-03 16:07:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1108. [2021-05-03 16:07:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 5.061427280939476) internal successors, (5603), 1107 states have internal predecessors, (5603), 0 states have call successors, (0), 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 16:07:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 5603 transitions. [2021-05-03 16:07:09,987 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 5603 transitions. Word has length 22 [2021-05-03 16:07:09,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:09,987 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 5603 transitions. [2021-05-03 16:07:09,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 16:07:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 5603 transitions. [2021-05-03 16:07:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:09,991 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:09,991 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:10,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 16:07:10,205 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:10,205 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 5 times [2021-05-03 16:07:10,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:10,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899674308] [2021-05-03 16:07:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:10,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899674308] [2021-05-03 16:07:10,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163421893] [2021-05-03 16:07:10,318 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 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 16:07:10,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:07:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:10,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:10,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:10,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:10,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 16:07:10,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120499063] [2021-05-03 16:07:10,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:10,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:10,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:10,555 INFO L87 Difference]: Start difference. First operand 1108 states and 5603 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:10,661 INFO L93 Difference]: Finished difference Result 1227 states and 5978 transitions. [2021-05-03 16:07:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:10,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:10,668 INFO L225 Difference]: With dead ends: 1227 [2021-05-03 16:07:10,668 INFO L226 Difference]: Without dead ends: 1222 [2021-05-03 16:07:10,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-05-03 16:07:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1133. [2021-05-03 16:07:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 5.0521201413427566) internal successors, (5719), 1132 states have internal predecessors, (5719), 0 states have call successors, (0), 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 16:07:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 5719 transitions. [2021-05-03 16:07:10,699 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 5719 transitions. Word has length 22 [2021-05-03 16:07:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:10,699 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 5719 transitions. [2021-05-03 16:07:10,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 5719 transitions. [2021-05-03 16:07:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:10,703 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:10,703 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:10,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:10,917 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 8 times [2021-05-03 16:07:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:10,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596419800] [2021-05-03 16:07:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596419800] [2021-05-03 16:07:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168155726] [2021-05-03 16:07:11,083 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 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 16:07:11,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:07:11,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 16:07:11,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:11,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:11,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:11,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:11,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:11,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:11,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-05-03 16:07:11,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-05-03 16:07:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:11,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:11,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 16:07:11,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613944906] [2021-05-03 16:07:11,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:07:11,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:07:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:11,459 INFO L87 Difference]: Start difference. First operand 1133 states and 5719 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 16:07:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:11,768 INFO L93 Difference]: Finished difference Result 2178 states and 10194 transitions. [2021-05-03 16:07:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:07:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 22 [2021-05-03 16:07:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:11,780 INFO L225 Difference]: With dead ends: 2178 [2021-05-03 16:07:11,780 INFO L226 Difference]: Without dead ends: 2134 [2021-05-03 16:07:11,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:07:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-05-03 16:07:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1129. [2021-05-03 16:07:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 5.01595744680851) internal successors, (5658), 1128 states have internal predecessors, (5658), 0 states have call successors, (0), 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 16:07:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 5658 transitions. [2021-05-03 16:07:11,813 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 5658 transitions. Word has length 22 [2021-05-03 16:07:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:11,813 INFO L480 AbstractCegarLoop]: Abstraction has 1129 states and 5658 transitions. [2021-05-03 16:07:11,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 16:07:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 5658 transitions. [2021-05-03 16:07:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:11,816 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:11,816 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:12,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-03 16:07:12,032 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1851398567, now seen corresponding path program 9 times [2021-05-03 16:07:12,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:12,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282506611] [2021-05-03 16:07:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:12,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282506611] [2021-05-03 16:07:12,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957603077] [2021-05-03 16:07:12,106 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 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 16:07:12,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:07:12,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:07:12,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:12,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:12,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-05-03 16:07:12,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404814683] [2021-05-03 16:07:12,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:07:12,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:12,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:07:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:12,294 INFO L87 Difference]: Start difference. First operand 1129 states and 5658 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:12,430 INFO L93 Difference]: Finished difference Result 1249 states and 6050 transitions. [2021-05-03 16:07:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:12,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:12,435 INFO L225 Difference]: With dead ends: 1249 [2021-05-03 16:07:12,436 INFO L226 Difference]: Without dead ends: 1233 [2021-05-03 16:07:12,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:07:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-05-03 16:07:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1137. [2021-05-03 16:07:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 5.007922535211268) internal successors, (5689), 1136 states have internal predecessors, (5689), 0 states have call successors, (0), 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 16:07:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 5689 transitions. [2021-05-03 16:07:12,481 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 5689 transitions. Word has length 22 [2021-05-03 16:07:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:12,481 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 5689 transitions. [2021-05-03 16:07:12,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 5689 transitions. [2021-05-03 16:07:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:12,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:12,485 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:12,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:12,701 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 10 times [2021-05-03 16:07:12,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:12,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288348927] [2021-05-03 16:07:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:12,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288348927] [2021-05-03 16:07:12,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840024425] [2021-05-03 16:07:12,818 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:12,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:07:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:13,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:13,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 16:07:13,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698978882] [2021-05-03 16:07:13,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:13,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:13,057 INFO L87 Difference]: Start difference. First operand 1137 states and 5689 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:13,275 INFO L93 Difference]: Finished difference Result 1205 states and 5916 transitions. [2021-05-03 16:07:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:07:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:13,280 INFO L225 Difference]: With dead ends: 1205 [2021-05-03 16:07:13,280 INFO L226 Difference]: Without dead ends: 1200 [2021-05-03 16:07:13,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:07:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-05-03 16:07:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1142. [2021-05-03 16:07:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 5.010517090271692) internal successors, (5717), 1141 states have internal predecessors, (5717), 0 states have call successors, (0), 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 16:07:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 5717 transitions. [2021-05-03 16:07:13,305 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 5717 transitions. Word has length 22 [2021-05-03 16:07:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:13,305 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 5717 transitions. [2021-05-03 16:07:13,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:13,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 5717 transitions. [2021-05-03 16:07:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:13,308 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:13,308 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:13,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 16:07:13,521 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:13,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 11 times [2021-05-03 16:07:13,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:13,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213581415] [2021-05-03 16:07:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213581415] [2021-05-03 16:07:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108955705] [2021-05-03 16:07:13,667 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:13,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:07:13,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:13,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 16:07:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:13,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:13,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:13,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:13,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:13,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-05-03 16:07:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:13,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:13,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 16:07:13,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069238543] [2021-05-03 16:07:13,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:07:13,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:13,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:07:13,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:13,902 INFO L87 Difference]: Start difference. First operand 1142 states and 5717 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 16:07:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:14,130 INFO L93 Difference]: Finished difference Result 1743 states and 8198 transitions. [2021-05-03 16:07:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:07:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 22 [2021-05-03 16:07:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:14,137 INFO L225 Difference]: With dead ends: 1743 [2021-05-03 16:07:14,137 INFO L226 Difference]: Without dead ends: 1729 [2021-05-03 16:07:14,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-05-03 16:07:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1199. [2021-05-03 16:07:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 5.064273789649416) internal successors, (6067), 1198 states have internal predecessors, (6067), 0 states have call successors, (0), 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 16:07:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 6067 transitions. [2021-05-03 16:07:14,176 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 6067 transitions. Word has length 22 [2021-05-03 16:07:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:14,176 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 6067 transitions. [2021-05-03 16:07:14,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 16:07:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 6067 transitions. [2021-05-03 16:07:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:14,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:14,180 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:14,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 16:07:14,397 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 12 times [2021-05-03 16:07:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:14,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899383994] [2021-05-03 16:07:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:14,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899383994] [2021-05-03 16:07:14,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771559523] [2021-05-03 16:07:14,495 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:14,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:07:14,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:07:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:14,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:14,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:14,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:14,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:14,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:14,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:07:14,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-05-03 16:07:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:14,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:14,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-05-03 16:07:14,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768798601] [2021-05-03 16:07:14,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:07:14,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:07:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:14,755 INFO L87 Difference]: Start difference. First operand 1199 states and 6067 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:15,172 INFO L93 Difference]: Finished difference Result 1573 states and 7555 transitions. [2021-05-03 16:07:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:07:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:15,179 INFO L225 Difference]: With dead ends: 1573 [2021-05-03 16:07:15,179 INFO L226 Difference]: Without dead ends: 1553 [2021-05-03 16:07:15,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:07:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-05-03 16:07:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1261. [2021-05-03 16:07:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 5.0738095238095235) internal successors, (6393), 1260 states have internal predecessors, (6393), 0 states have call successors, (0), 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 16:07:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 6393 transitions. [2021-05-03 16:07:15,215 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 6393 transitions. Word has length 22 [2021-05-03 16:07:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:15,215 INFO L480 AbstractCegarLoop]: Abstraction has 1261 states and 6393 transitions. [2021-05-03 16:07:15,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 6393 transitions. [2021-05-03 16:07:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:15,218 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:15,218 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:15,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 16:07:15,434 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 13 times [2021-05-03 16:07:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090877221] [2021-05-03 16:07:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:15,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090877221] [2021-05-03 16:07:15,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251083970] [2021-05-03 16:07:15,550 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:15,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:15,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 16:07:15,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683681896] [2021-05-03 16:07:15,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:15,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:15,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:15,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:15,815 INFO L87 Difference]: Start difference. First operand 1261 states and 6393 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:15,979 INFO L93 Difference]: Finished difference Result 1457 states and 6995 transitions. [2021-05-03 16:07:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:15,984 INFO L225 Difference]: With dead ends: 1457 [2021-05-03 16:07:15,984 INFO L226 Difference]: Without dead ends: 1450 [2021-05-03 16:07:15,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-05-03 16:07:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1238. [2021-05-03 16:07:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 5.019401778496362) internal successors, (6209), 1237 states have internal predecessors, (6209), 0 states have call successors, (0), 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 16:07:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 6209 transitions. [2021-05-03 16:07:16,015 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 6209 transitions. Word has length 22 [2021-05-03 16:07:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:16,015 INFO L480 AbstractCegarLoop]: Abstraction has 1238 states and 6209 transitions. [2021-05-03 16:07:16,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 6209 transitions. [2021-05-03 16:07:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:16,018 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:16,018 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:16,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:16,233 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1264592553, now seen corresponding path program 14 times [2021-05-03 16:07:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:16,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683677351] [2021-05-03 16:07:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:16,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683677351] [2021-05-03 16:07:16,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635287468] [2021-05-03 16:07:16,310 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:16,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:07:16,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 16:07:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:16,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:16,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:16,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:16,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:16,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-05-03 16:07:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:16,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:16,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-03 16:07:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12113441] [2021-05-03 16:07:16,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:07:16,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:07:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:07:16,548 INFO L87 Difference]: Start difference. First operand 1238 states and 6209 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 16:07:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:16,745 INFO L93 Difference]: Finished difference Result 1354 states and 6446 transitions. [2021-05-03 16:07:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 22 [2021-05-03 16:07:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:16,750 INFO L225 Difference]: With dead ends: 1354 [2021-05-03 16:07:16,750 INFO L226 Difference]: Without dead ends: 1342 [2021-05-03 16:07:16,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-05-03 16:07:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1179. [2021-05-03 16:07:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 4.953310696095077) internal successors, (5835), 1178 states have internal predecessors, (5835), 0 states have call successors, (0), 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 16:07:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 5835 transitions. [2021-05-03 16:07:16,781 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 5835 transitions. Word has length 22 [2021-05-03 16:07:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:16,782 INFO L480 AbstractCegarLoop]: Abstraction has 1179 states and 5835 transitions. [2021-05-03 16:07:16,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 16:07:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 5835 transitions. [2021-05-03 16:07:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:16,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:16,785 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:16,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 16:07:16,997 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-05-03 16:07:16,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:16,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645989994] [2021-05-03 16:07:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:17,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645989994] [2021-05-03 16:07:17,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689346447] [2021-05-03 16:07:17,101 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:17,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:07:17,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:07:17,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:17,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:17,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 16:07:17,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373956571] [2021-05-03 16:07:17,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:17,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:17,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:17,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:17,297 INFO L87 Difference]: Start difference. First operand 1179 states and 5835 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:17,451 INFO L93 Difference]: Finished difference Result 1232 states and 6006 transitions. [2021-05-03 16:07:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:17,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:17,455 INFO L225 Difference]: With dead ends: 1232 [2021-05-03 16:07:17,455 INFO L226 Difference]: Without dead ends: 1227 [2021-05-03 16:07:17,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-05-03 16:07:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1184. [2021-05-03 16:07:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 4.945900253592561) internal successors, (5851), 1183 states have internal predecessors, (5851), 0 states have call successors, (0), 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 16:07:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 5851 transitions. [2021-05-03 16:07:17,479 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 5851 transitions. Word has length 22 [2021-05-03 16:07:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:17,480 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 5851 transitions. [2021-05-03 16:07:17,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 5851 transitions. [2021-05-03 16:07:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:17,483 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:17,483 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:17,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:17,697 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-05-03 16:07:17,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:17,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847530518] [2021-05-03 16:07:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:17,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847530518] [2021-05-03 16:07:17,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550409194] [2021-05-03 16:07:17,788 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:17,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:07:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:18,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:18,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:18,191 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-05-03 16:07:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:18,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:18,212 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-05-03 16:07:18,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:18,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-05-03 16:07:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:18,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:18,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 16:07:18,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040293454] [2021-05-03 16:07:18,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:18,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:18,253 INFO L87 Difference]: Start difference. First operand 1184 states and 5851 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 16:07:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:18,577 INFO L93 Difference]: Finished difference Result 1635 states and 7595 transitions. [2021-05-03 16:07:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:07:18,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 22 [2021-05-03 16:07:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:18,582 INFO L225 Difference]: With dead ends: 1635 [2021-05-03 16:07:18,582 INFO L226 Difference]: Without dead ends: 1616 [2021-05-03 16:07:18,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:07:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-05-03 16:07:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1233. [2021-05-03 16:07:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 4.982954545454546) internal successors, (6139), 1232 states have internal predecessors, (6139), 0 states have call successors, (0), 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 16:07:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 6139 transitions. [2021-05-03 16:07:18,609 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 6139 transitions. Word has length 22 [2021-05-03 16:07:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:18,609 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 6139 transitions. [2021-05-03 16:07:18,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 16:07:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 6139 transitions. [2021-05-03 16:07:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:18,612 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:18,612 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:18,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 16:07:18,825 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-05-03 16:07:18,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:18,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409623155] [2021-05-03 16:07:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:18,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409623155] [2021-05-03 16:07:18,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820197367] [2021-05-03 16:07:18,897 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:18,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:07:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 16:07:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:19,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:19,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:19,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:19,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:19,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-05-03 16:07:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:19,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:19,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:07:19,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840894916] [2021-05-03 16:07:19,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:07:19,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:07:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:07:19,069 INFO L87 Difference]: Start difference. First operand 1233 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 16:07:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:19,311 INFO L93 Difference]: Finished difference Result 1856 states and 8646 transitions. [2021-05-03 16:07:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:07:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 16:07:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:19,317 INFO L225 Difference]: With dead ends: 1856 [2021-05-03 16:07:19,317 INFO L226 Difference]: Without dead ends: 1832 [2021-05-03 16:07:19,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:07:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-05-03 16:07:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1293. [2021-05-03 16:07:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 5.05030959752322) internal successors, (6525), 1292 states have internal predecessors, (6525), 0 states have call successors, (0), 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 16:07:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 6525 transitions. [2021-05-03 16:07:19,359 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 6525 transitions. Word has length 22 [2021-05-03 16:07:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:19,359 INFO L480 AbstractCegarLoop]: Abstraction has 1293 states and 6525 transitions. [2021-05-03 16:07:19,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 16:07:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 6525 transitions. [2021-05-03 16:07:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:19,362 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:19,363 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:19,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 16:07:19,577 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-05-03 16:07:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:19,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147474295] [2021-05-03 16:07:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:19,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147474295] [2021-05-03 16:07:19,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070953827] [2021-05-03 16:07:19,661 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:19,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:07:19,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:19,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:19,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 16:07:19,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073996897] [2021-05-03 16:07:19,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:07:19,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:19,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:07:19,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:19,983 INFO L87 Difference]: Start difference. First operand 1293 states and 6525 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:20,089 INFO L93 Difference]: Finished difference Result 1304 states and 6549 transitions. [2021-05-03 16:07:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:07:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:20,092 INFO L225 Difference]: With dead ends: 1304 [2021-05-03 16:07:20,092 INFO L226 Difference]: Without dead ends: 1302 [2021-05-03 16:07:20,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:07:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-05-03 16:07:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1298. [2021-05-03 16:07:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 5.036237471087124) internal successors, (6532), 1297 states have internal predecessors, (6532), 0 states have call successors, (0), 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 16:07:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 6532 transitions. [2021-05-03 16:07:20,115 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 6532 transitions. Word has length 22 [2021-05-03 16:07:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:20,115 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 6532 transitions. [2021-05-03 16:07:20,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 6532 transitions. [2021-05-03 16:07:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:20,118 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:20,118 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:20,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 16:07:20,329 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-05-03 16:07:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:20,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857601928] [2021-05-03 16:07:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:20,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857601928] [2021-05-03 16:07:20,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716478648] [2021-05-03 16:07:20,473 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:20,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:07:20,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:20,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:07:20,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:22,036 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-05-03 16:07:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:22,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:22,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-05-03 16:07:22,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013075459] [2021-05-03 16:07:22,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:22,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:22,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:22,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:22,062 INFO L87 Difference]: Start difference. First operand 1298 states and 6532 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:22,447 INFO L93 Difference]: Finished difference Result 1307 states and 6549 transitions. [2021-05-03 16:07:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:22,451 INFO L225 Difference]: With dead ends: 1307 [2021-05-03 16:07:22,452 INFO L226 Difference]: Without dead ends: 1305 [2021-05-03 16:07:22,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1868.5ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:07:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-05-03 16:07:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1296. [2021-05-03 16:07:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 5.0355212355212355) internal successors, (6521), 1295 states have internal predecessors, (6521), 0 states have call successors, (0), 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 16:07:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 6521 transitions. [2021-05-03 16:07:22,482 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 6521 transitions. Word has length 22 [2021-05-03 16:07:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:22,482 INFO L480 AbstractCegarLoop]: Abstraction has 1296 states and 6521 transitions. [2021-05-03 16:07:22,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 6521 transitions. [2021-05-03 16:07:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:22,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:22,485 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:22,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 16:07:22,701 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:22,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1448901451, now seen corresponding path program 6 times [2021-05-03 16:07:22,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:22,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333459834] [2021-05-03 16:07:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333459834] [2021-05-03 16:07:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438184189] [2021-05-03 16:07:22,828 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:22,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:07:22,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:07:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:23,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:23,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:23,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:23,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:23,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-05-03 16:07:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:23,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:23,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 16:07:23,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789941261] [2021-05-03 16:07:23,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:23,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:23,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:23,089 INFO L87 Difference]: Start difference. First operand 1296 states and 6521 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 16:07:23,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:23,379 INFO L93 Difference]: Finished difference Result 1343 states and 6669 transitions. [2021-05-03 16:07:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:23,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 22 [2021-05-03 16:07:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:23,383 INFO L225 Difference]: With dead ends: 1343 [2021-05-03 16:07:23,383 INFO L226 Difference]: Without dead ends: 1334 [2021-05-03 16:07:23,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:07:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-05-03 16:07:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1297. [2021-05-03 16:07:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 5.042438271604938) internal successors, (6535), 1296 states have internal predecessors, (6535), 0 states have call successors, (0), 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 16:07:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 6535 transitions. [2021-05-03 16:07:23,404 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 6535 transitions. Word has length 22 [2021-05-03 16:07:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:23,404 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 6535 transitions. [2021-05-03 16:07:23,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 16:07:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 6535 transitions. [2021-05-03 16:07:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:07:23,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:23,407 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:23,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:23,608 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 7 times [2021-05-03 16:07:23,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:23,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439191083] [2021-05-03 16:07:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:23,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439191083] [2021-05-03 16:07:23,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346032810] [2021-05-03 16:07:23,704 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:23,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:24,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:24,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 16:07:24,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842546032] [2021-05-03 16:07:24,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:07:24,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:07:24,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:24,079 INFO L87 Difference]: Start difference. First operand 1297 states and 6535 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:24,294 INFO L93 Difference]: Finished difference Result 1313 states and 6570 transitions. [2021-05-03 16:07:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:07:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:24,297 INFO L225 Difference]: With dead ends: 1313 [2021-05-03 16:07:24,297 INFO L226 Difference]: Without dead ends: 1312 [2021-05-03 16:07:24,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:07:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-05-03 16:07:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1299. [2021-05-03 16:07:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 5.037750385208012) internal successors, (6539), 1298 states have internal predecessors, (6539), 0 states have call successors, (0), 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 16:07:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 6539 transitions. [2021-05-03 16:07:24,318 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 6539 transitions. Word has length 22 [2021-05-03 16:07:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:24,318 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 6539 transitions. [2021-05-03 16:07:24,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 6539 transitions. [2021-05-03 16:07:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:07:24,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:24,321 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:24,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 16:07:24,537 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:24,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1751157336, now seen corresponding path program 6 times [2021-05-03 16:07:24,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:24,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475282029] [2021-05-03 16:07:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:24,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475282029] [2021-05-03 16:07:24,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922635901] [2021-05-03 16:07:24,614 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:24,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:07:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:24,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:24,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:24,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:24,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:07:24,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:24,940 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-05-03 16:07:24,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:07:24,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-05-03 16:07:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:24,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:24,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-05-03 16:07:24,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290708552] [2021-05-03 16:07:24,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:24,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:24,997 INFO L87 Difference]: Start difference. First operand 1299 states and 6539 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 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 16:07:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:25,179 INFO L93 Difference]: Finished difference Result 2334 states and 10656 transitions. [2021-05-03 16:07:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:07:25,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 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 23 [2021-05-03 16:07:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:25,186 INFO L225 Difference]: With dead ends: 2334 [2021-05-03 16:07:25,186 INFO L226 Difference]: Without dead ends: 2313 [2021-05-03 16:07:25,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:07:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-05-03 16:07:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1344. [2021-05-03 16:07:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 5.061801935964259) internal successors, (6798), 1343 states have internal predecessors, (6798), 0 states have call successors, (0), 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 16:07:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 6798 transitions. [2021-05-03 16:07:25,219 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 6798 transitions. Word has length 23 [2021-05-03 16:07:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:25,219 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 6798 transitions. [2021-05-03 16:07:25,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 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 16:07:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 6798 transitions. [2021-05-03 16:07:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:07:25,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:25,222 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:25,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-03 16:07:25,423 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-05-03 16:07:25,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:25,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088152202] [2021-05-03 16:07:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088152202] [2021-05-03 16:07:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244409881] [2021-05-03 16:07:25,543 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:07:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:25,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:25,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-03 16:07:25,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159995805] [2021-05-03 16:07:25,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:07:25,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:25,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:07:25,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:07:25,921 INFO L87 Difference]: Start difference. First operand 1344 states and 6798 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 16:07:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:26,090 INFO L93 Difference]: Finished difference Result 1283 states and 6260 transitions. [2021-05-03 16:07:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:07:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-05-03 16:07:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:26,094 INFO L225 Difference]: With dead ends: 1283 [2021-05-03 16:07:26,094 INFO L226 Difference]: Without dead ends: 1274 [2021-05-03 16:07:26,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:07:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-05-03 16:07:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1250. [2021-05-03 16:07:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.948759007205765) internal successors, (6181), 1249 states have internal predecessors, (6181), 0 states have call successors, (0), 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 16:07:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 6181 transitions. [2021-05-03 16:07:26,117 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 6181 transitions. Word has length 23 [2021-05-03 16:07:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:26,117 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 6181 transitions. [2021-05-03 16:07:26,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 16:07:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 6181 transitions. [2021-05-03 16:07:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:07:26,120 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:26,120 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:26,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:26,337 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-05-03 16:07:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:26,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095343633] [2021-05-03 16:07:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:26,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095343633] [2021-05-03 16:07:26,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769172093] [2021-05-03 16:07:26,420 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:26,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:07:26,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 16:07:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:26,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:26,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:26,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:26,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:26,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:26,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-05-03 16:07:26,663 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-05-03 16:07:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:26,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:26,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 16:07:26,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131074203] [2021-05-03 16:07:26,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:07:26,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:07:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:26,758 INFO L87 Difference]: Start difference. First operand 1250 states and 6181 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:26,843 INFO L93 Difference]: Finished difference Result 1199 states and 5228 transitions. [2021-05-03 16:07:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:07:26,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 23 [2021-05-03 16:07:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:26,846 INFO L225 Difference]: With dead ends: 1199 [2021-05-03 16:07:26,847 INFO L226 Difference]: Without dead ends: 1193 [2021-05-03 16:07:26,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:07:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-05-03 16:07:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 972. [2021-05-03 16:07:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.668383110195674) internal successors, (4533), 971 states have internal predecessors, (4533), 0 states have call successors, (0), 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 16:07:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4533 transitions. [2021-05-03 16:07:26,866 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4533 transitions. Word has length 23 [2021-05-03 16:07:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:26,867 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 4533 transitions. [2021-05-03 16:07:26,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4533 transitions. [2021-05-03 16:07:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:07:26,868 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:26,868 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:27,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:27,069 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-05-03 16:07:27,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311211479] [2021-05-03 16:07:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:27,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311211479] [2021-05-03 16:07:27,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133483389] [2021-05-03 16:07:27,152 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:27,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 16:07:27,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:07:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:27,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:27,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-03 16:07:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485232372] [2021-05-03 16:07:27,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:07:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:07:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:07:27,501 INFO L87 Difference]: Start difference. First operand 972 states and 4533 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 16:07:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:27,577 INFO L93 Difference]: Finished difference Result 983 states and 4449 transitions. [2021-05-03 16:07:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-05-03 16:07:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:27,581 INFO L225 Difference]: With dead ends: 983 [2021-05-03 16:07:27,581 INFO L226 Difference]: Without dead ends: 977 [2021-05-03 16:07:27,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:07:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-03 16:07:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 949. [2021-05-03 16:07:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 4.60337552742616) internal successors, (4364), 948 states have internal predecessors, (4364), 0 states have call successors, (0), 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 16:07:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 4364 transitions. [2021-05-03 16:07:27,599 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 4364 transitions. Word has length 23 [2021-05-03 16:07:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:27,600 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 4364 transitions. [2021-05-03 16:07:27,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 16:07:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 4364 transitions. [2021-05-03 16:07:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:07:27,602 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:27,602 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:27,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:27,814 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2015084676, now seen corresponding path program 18 times [2021-05-03 16:07:27,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:27,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763688676] [2021-05-03 16:07:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:27,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763688676] [2021-05-03 16:07:27,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898620177] [2021-05-03 16:07:27,887 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:27,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:07:27,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:07:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:28,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-05-03 16:07:28,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:28,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:28,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:28,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-05-03 16:07:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:28,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:28,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-05-03 16:07:28,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886020472] [2021-05-03 16:07:28,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:07:28,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:07:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:07:28,113 INFO L87 Difference]: Start difference. First operand 949 states and 4364 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:28,295 INFO L93 Difference]: Finished difference Result 1411 states and 5930 transitions. [2021-05-03 16:07:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:07:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 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 23 [2021-05-03 16:07:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:28,299 INFO L225 Difference]: With dead ends: 1411 [2021-05-03 16:07:28,299 INFO L226 Difference]: Without dead ends: 1405 [2021-05-03 16:07:28,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-05-03 16:07:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 947. [2021-05-03 16:07:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 4.619450317124736) internal successors, (4370), 946 states have internal predecessors, (4370), 0 states have call successors, (0), 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 16:07:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 4370 transitions. [2021-05-03 16:07:28,320 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 4370 transitions. Word has length 23 [2021-05-03 16:07:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:28,321 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 4370 transitions. [2021-05-03 16:07:28,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 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 16:07:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 4370 transitions. [2021-05-03 16:07:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:07:28,323 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:28,323 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:28,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-03 16:07:28,529 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 19 times [2021-05-03 16:07:28,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:28,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913981802] [2021-05-03 16:07:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:28,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913981802] [2021-05-03 16:07:28,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774506700] [2021-05-03 16:07:28,663 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:07:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:29,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:29,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-03 16:07:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528310439] [2021-05-03 16:07:29,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:07:29,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:07:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:07:29,022 INFO L87 Difference]: Start difference. First operand 947 states and 4370 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 16:07:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:29,068 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2021-05-03 16:07:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:07:29,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-05-03 16:07:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:29,068 INFO L225 Difference]: With dead ends: 16 [2021-05-03 16:07:29,068 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 16:07:29,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:07:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 16:07:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 16:07:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 16:07:29,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-05-03 16:07:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:29,069 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 16:07:29,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 16:07:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 16:07:29,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 16:07:29,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:29,288 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:07:29 BasicIcfg [2021-05-03 16:07:29,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:07:29,288 INFO L168 Benchmark]: Toolchain (without parser) took 33145.75 ms. Allocated memory was 381.7 MB in the beginning and 796.9 MB in the end (delta: 415.2 MB). Free memory was 361.6 MB in the beginning and 404.6 MB in the end (delta: -42.9 MB). Peak memory consumption was 375.0 MB. Max. memory is 16.0 GB. [2021-05-03 16:07:29,288 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 381.7 MB. Free memory was 363.0 MB in the beginning and 362.9 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:07:29,288 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.64 ms. Allocated memory is still 381.7 MB. Free memory was 361.6 MB in the beginning and 360.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:07:29,288 INFO L168 Benchmark]: Boogie Preprocessor took 23.18 ms. Allocated memory is still 381.7 MB. Free memory was 360.0 MB in the beginning and 358.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:07:29,288 INFO L168 Benchmark]: RCFGBuilder took 532.72 ms. Allocated memory is still 381.7 MB. Free memory was 358.8 MB in the beginning and 345.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-05-03 16:07:29,288 INFO L168 Benchmark]: TraceAbstraction took 32563.44 ms. Allocated memory was 381.7 MB in the beginning and 796.9 MB in the end (delta: 415.2 MB). Free memory was 345.8 MB in the beginning and 404.6 MB in the end (delta: -58.8 MB). Peak memory consumption was 357.5 MB. Max. memory is 16.0 GB. [2021-05-03 16:07:29,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 381.7 MB. Free memory was 363.0 MB in the beginning and 362.9 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.64 ms. Allocated memory is still 381.7 MB. Free memory was 361.6 MB in the beginning and 360.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.18 ms. Allocated memory is still 381.7 MB. Free memory was 360.0 MB in the beginning and 358.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 532.72 ms. Allocated memory is still 381.7 MB. Free memory was 358.8 MB in the beginning and 345.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 32563.44 ms. Allocated memory was 381.7 MB in the beginning and 796.9 MB in the end (delta: 415.2 MB). Free memory was 345.8 MB in the beginning and 404.6 MB in the end (delta: -58.8 MB). Peak memory consumption was 357.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 172]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32503.5ms, OverallIterations: 45, TraceHistogramMax: 5, EmptinessCheckTime: 110.0ms, AutomataDifference: 6925.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1438 SDtfs, 2468 SDslu, 10341 SDs, 0 SdLazy, 4432 SolverSat, 365 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2302.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1253 GetRequests, 642 SyntacticMatches, 8 SemanticMatches, 603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 11995.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1344occurred in iteration=40, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 817.3ms AutomataMinimizationTime, 45 MinimizatonAttempts, 7294 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 320.3ms SsaConstructionTime, 880.6ms SatisfiabilityAnalysisTime, 13314.3ms InterpolantComputationTime, 1793 NumberOfCodeBlocks, 1793 NumberOfCodeBlocksAsserted, 150 NumberOfCheckSat, 1706 ConstructedInterpolants, 58 QuantifiedInterpolants, 20088 SizeOfPredicates, 372 NumberOfNonLiveVariables, 2973 ConjunctsInSsa, 532 ConjunctsInUnsatCore, 87 InterpolantComputations, 4 PerfectInterpolantSequences, 224/890 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...