/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/NonAtomicIncrement_2Threads_Loop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:31:59,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:31:59,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:31:59,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:31:59,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 20:31:59,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 20:31:59,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 20:31:59,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 20:31:59,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 20:31:59,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 20:31:59,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 20:31:59,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 20:31:59,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 20:31:59,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 20:31:59,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 20:31:59,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 20:31:59,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 20:31:59,710 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 [2021-03-10 20:31:59,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:31:59,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:31:59,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:31:59,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:31:59,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:31:59,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:31:59,748 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:31:59,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:31:59,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:31:59,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:31:59,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:31:59,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:31:59,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:31:59,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:31:59,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:31:59,750 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:31:59,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:31:59,750 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:31:59,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:31:59,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:31:59,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:31:59,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:31:59,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:31:59,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:31:59,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:31:59,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:31:59,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:31:59,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:31:59,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:31:59,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:31:59,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:31:59,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:32:00,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:32:00,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:32:00,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:32:00,121 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:32:00,122 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:32:00,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/NonAtomicIncrement_2Threads_Loop.bpl [2021-03-10 20:32:00,123 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/NonAtomicIncrement_2Threads_Loop.bpl' [2021-03-10 20:32:00,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:32:00,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:32:00,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:32:00,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:32:00,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:32:00,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:32:00,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:32:00,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:32:00,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:32:00,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/1) ... [2021-03-10 20:32:00,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:32:00,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:32:00,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:32:00,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:32:00,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (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 [2021-03-10 20:32:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure fistIncrementProcess [2021-03-10 20:32:00,268 INFO L138 BoogieDeclarations]: Found implementation of procedure fistIncrementProcess [2021-03-10 20:32:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:32:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:32:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrementProcess [2021-03-10 20:32:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrementProcess [2021-03-10 20:32:00,270 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:32:00,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:32:00,388 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 20:32:00,389 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:32:00 BoogieIcfgContainer [2021-03-10 20:32:00,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:32:00,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:32:00,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:32:00,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:32:00,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:00" (1/2) ... [2021-03-10 20:32:00,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f776287 and model type NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:32:00, skipping insertion in model container [2021-03-10 20:32:00,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:32:00" (2/2) ... [2021-03-10 20:32:00,395 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads_Loop.bpl [2021-03-10 20:32:00,399 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:32:00,400 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:32:00,403 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:32:00,403 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:32:00,422 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,422 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,422 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,423 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,423 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,423 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,423 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,423 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,424 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,424 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,424 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,424 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,424 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,425 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,425 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,425 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,425 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,426 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,426 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,426 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,426 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,426 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,427 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,427 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,427 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,427 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,427 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,428 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,429 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,430 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,433 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,433 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:00,438 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 20:32:00,452 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 20:32:00,469 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:32:00,469 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:32:00,469 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:32:00,469 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:32:00,470 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:32:00,470 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:32:00,470 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:32:00,470 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:32:00,478 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 26 transitions, 74 flow [2021-03-10 20:32:00,497 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 76 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:32:00,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:00,508 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:00,509 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1220513213, now seen corresponding path program 1 times [2021-03-10 20:32:00,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:00,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377085119] [2021-03-10 20:32:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:00,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377085119] [2021-03-10 20:32:00,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:32:00,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:32:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627666069] [2021-03-10 20:32:00,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:32:00,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:32:00,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:32:00,675 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 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 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:00,719 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-03-10 20:32:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:32:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-03-10 20:32:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:00,732 INFO L225 Difference]: With dead ends: 112 [2021-03-10 20:32:00,732 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 20:32:00,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:32:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 20:32:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2021-03-10 20:32:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 163 transitions. [2021-03-10 20:32:00,782 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 163 transitions. Word has length 12 [2021-03-10 20:32:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:00,783 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 163 transitions. [2021-03-10 20:32:00,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 163 transitions. [2021-03-10 20:32:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 20:32:00,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:00,786 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:00,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:32:00,787 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash 494030054, now seen corresponding path program 1 times [2021-03-10 20:32:00,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:00,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505026222] [2021-03-10 20:32:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:00,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505026222] [2021-03-10 20:32:00,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283719795] [2021-03-10 20:32:00,866 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 [2021-03-10 20:32:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:00,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-03-10 20:32:00,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:32:01,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 20:32:01,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-03-10 20:32:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350576402] [2021-03-10 20:32:01,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:32:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:01,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:32:01,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:01,010 INFO L87 Difference]: Start difference. First operand 83 states and 163 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-03-10 20:32:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:01,022 INFO L93 Difference]: Finished difference Result 119 states and 235 transitions. [2021-03-10 20:32:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:32:01,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 [2021-03-10 20:32:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:01,024 INFO L225 Difference]: With dead ends: 119 [2021-03-10 20:32:01,024 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 20:32:01,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 20:32:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2021-03-10 20:32:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 181 transitions. [2021-03-10 20:32:01,032 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 181 transitions. Word has length 16 [2021-03-10 20:32:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:01,033 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 181 transitions. [2021-03-10 20:32:01,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-03-10 20:32:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 181 transitions. [2021-03-10 20:32:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 20:32:01,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:01,034 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:01,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 20:32:01,255 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1490798487, now seen corresponding path program 1 times [2021-03-10 20:32:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:01,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449017193] [2021-03-10 20:32:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:32:01,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449017193] [2021-03-10 20:32:01,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793282237] [2021-03-10 20:32:01,288 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 [2021-03-10 20:32:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 20:32:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:32:01,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:01,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 20:32:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994921068] [2021-03-10 20:32:01,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:32:01,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:32:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:32:01,404 INFO L87 Difference]: Start difference. First operand 92 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:01,419 INFO L93 Difference]: Finished difference Result 162 states and 321 transitions. [2021-03-10 20:32:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:32:01,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-03-10 20:32:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:01,421 INFO L225 Difference]: With dead ends: 162 [2021-03-10 20:32:01,421 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 20:32:01,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:32:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 20:32:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-03-10 20:32:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 131 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 261 transitions. [2021-03-10 20:32:01,431 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 261 transitions. Word has length 20 [2021-03-10 20:32:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:01,432 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 261 transitions. [2021-03-10 20:32:01,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:01,432 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 261 transitions. [2021-03-10 20:32:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 20:32:01,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:01,433 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:01,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:01,655 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash -336674260, now seen corresponding path program 2 times [2021-03-10 20:32:01,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:01,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790087752] [2021-03-10 20:32:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 20:32:01,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790087752] [2021-03-10 20:32:01,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394089602] [2021-03-10 20:32:01,686 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 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 [2021-03-10 20:32:01,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:32:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 20:32:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:32:01,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:01,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-03-10 20:32:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319233239] [2021-03-10 20:32:01,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:32:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:32:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:32:01,794 INFO L87 Difference]: Start difference. First operand 132 states and 261 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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) [2021-03-10 20:32:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:01,919 INFO L93 Difference]: Finished difference Result 291 states and 579 transitions. [2021-03-10 20:32:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 20:32:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 24 [2021-03-10 20:32:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:01,921 INFO L225 Difference]: With dead ends: 291 [2021-03-10 20:32:01,921 INFO L226 Difference]: Without dead ends: 291 [2021-03-10 20:32:01,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:32:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-03-10 20:32:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 240. [2021-03-10 20:32:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.99581589958159) internal successors, (477), 239 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 477 transitions. [2021-03-10 20:32:01,933 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 477 transitions. Word has length 24 [2021-03-10 20:32:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:01,933 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 477 transitions. [2021-03-10 20:32:01,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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) [2021-03-10 20:32:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 477 transitions. [2021-03-10 20:32:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 20:32:01,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:01,940 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:02,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:02,164 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:02,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1232424590, now seen corresponding path program 3 times [2021-03-10 20:32:02,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:02,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500934752] [2021-03-10 20:32:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-03-10 20:32:02,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500934752] [2021-03-10 20:32:02,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168313289] [2021-03-10 20:32:02,228 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 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 [2021-03-10 20:32:02,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 20:32:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 20:32:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-03-10 20:32:02,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:02,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 20:32:02,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585884789] [2021-03-10 20:32:02,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:32:02,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:32:02,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:02,351 INFO L87 Difference]: Start difference. First operand 240 states and 477 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:02,366 INFO L93 Difference]: Finished difference Result 308 states and 613 transitions. [2021-03-10 20:32:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:32:02,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 20:32:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:02,367 INFO L225 Difference]: With dead ends: 308 [2021-03-10 20:32:02,367 INFO L226 Difference]: Without dead ends: 308 [2021-03-10 20:32:02,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-03-10 20:32:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-03-10 20:32:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.996742671009772) internal successors, (613), 307 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 613 transitions. [2021-03-10 20:32:02,377 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 613 transitions. Word has length 32 [2021-03-10 20:32:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:02,377 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 613 transitions. [2021-03-10 20:32:02,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 613 transitions. [2021-03-10 20:32:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:02,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:02,379 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:02,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:02,594 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2099214069, now seen corresponding path program 4 times [2021-03-10 20:32:02,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:02,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665170341] [2021-03-10 20:32:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:02,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665170341] [2021-03-10 20:32:02,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:32:02,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-03-10 20:32:02,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399946403] [2021-03-10 20:32:02,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 20:32:02,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 20:32:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:32:02,783 INFO L87 Difference]: Start difference. First operand 308 states and 613 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-03-10 20:32:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:03,124 INFO L93 Difference]: Finished difference Result 1129 states and 2254 transitions. [2021-03-10 20:32:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 20:32:03,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 36 [2021-03-10 20:32:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:03,127 INFO L225 Difference]: With dead ends: 1129 [2021-03-10 20:32:03,128 INFO L226 Difference]: Without dead ends: 572 [2021-03-10 20:32:03,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-03-10 20:32:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-10 20:32:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 365. [2021-03-10 20:32:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.9752747252747254) internal successors, (719), 364 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 719 transitions. [2021-03-10 20:32:03,147 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 719 transitions. Word has length 36 [2021-03-10 20:32:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:03,148 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 719 transitions. [2021-03-10 20:32:03,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-03-10 20:32:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 719 transitions. [2021-03-10 20:32:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:03,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:03,151 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:03,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 20:32:03,151 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:03,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1439417367, now seen corresponding path program 5 times [2021-03-10 20:32:03,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:03,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279055014] [2021-03-10 20:32:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:03,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279055014] [2021-03-10 20:32:03,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742439511] [2021-03-10 20:32:03,292 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 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 [2021-03-10 20:32:03,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 20:32:03,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 20:32:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:03,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:03,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 20:32:03,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98884976] [2021-03-10 20:32:03,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 20:32:03,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:03,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 20:32:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:32:03,458 INFO L87 Difference]: Start difference. First operand 365 states and 719 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:03,725 INFO L93 Difference]: Finished difference Result 1051 states and 2075 transitions. [2021-03-10 20:32:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 20:32:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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 36 [2021-03-10 20:32:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:03,730 INFO L225 Difference]: With dead ends: 1051 [2021-03-10 20:32:03,730 INFO L226 Difference]: Without dead ends: 491 [2021-03-10 20:32:03,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2021-03-10 20:32:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-03-10 20:32:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 331. [2021-03-10 20:32:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.9545454545454546) internal successors, (645), 330 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 645 transitions. [2021-03-10 20:32:03,740 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 645 transitions. Word has length 36 [2021-03-10 20:32:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:03,740 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 645 transitions. [2021-03-10 20:32:03,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 645 transitions. [2021-03-10 20:32:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:03,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:03,742 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:03,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 20:32:03,963 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1486001743, now seen corresponding path program 6 times [2021-03-10 20:32:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:03,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449011161] [2021-03-10 20:32:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:04,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449011161] [2021-03-10 20:32:04,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146938562] [2021-03-10 20:32:04,084 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 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 [2021-03-10 20:32:04,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 20:32:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 20:32:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:04,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:04,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 20:32:04,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005183431] [2021-03-10 20:32:04,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 20:32:04,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 20:32:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:32:04,207 INFO L87 Difference]: Start difference. First operand 331 states and 645 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:04,474 INFO L93 Difference]: Finished difference Result 1357 states and 2666 transitions. [2021-03-10 20:32:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 20:32:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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 36 [2021-03-10 20:32:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:04,479 INFO L225 Difference]: With dead ends: 1357 [2021-03-10 20:32:04,479 INFO L226 Difference]: Without dead ends: 1011 [2021-03-10 20:32:04,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 20:32:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-03-10 20:32:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 550. [2021-03-10 20:32:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.97632058287796) internal successors, (1085), 549 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1085 transitions. [2021-03-10 20:32:04,495 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1085 transitions. Word has length 36 [2021-03-10 20:32:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:04,496 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1085 transitions. [2021-03-10 20:32:04,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1085 transitions. [2021-03-10 20:32:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:04,501 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:04,501 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:04,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:04,723 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1592559793, now seen corresponding path program 7 times [2021-03-10 20:32:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:04,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965146293] [2021-03-10 20:32:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:04,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965146293] [2021-03-10 20:32:04,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865930232] [2021-03-10 20:32:04,793 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:32:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:32:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:04,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:04,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 20:32:04,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239385891] [2021-03-10 20:32:04,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 20:32:04,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 20:32:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 20:32:04,923 INFO L87 Difference]: Start difference. First operand 550 states and 1085 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-03-10 20:32:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:05,086 INFO L93 Difference]: Finished difference Result 976 states and 1894 transitions. [2021-03-10 20:32:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 20:32:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 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 36 [2021-03-10 20:32:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:05,091 INFO L225 Difference]: With dead ends: 976 [2021-03-10 20:32:05,091 INFO L226 Difference]: Without dead ends: 782 [2021-03-10 20:32:05,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-03-10 20:32:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-03-10 20:32:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 488. [2021-03-10 20:32:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.9548254620123204) internal successors, (952), 487 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 952 transitions. [2021-03-10 20:32:05,105 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 952 transitions. Word has length 36 [2021-03-10 20:32:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:05,105 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 952 transitions. [2021-03-10 20:32:05,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-03-10 20:32:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 952 transitions. [2021-03-10 20:32:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:05,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:05,107 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:05,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:05,323 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash -205248591, now seen corresponding path program 8 times [2021-03-10 20:32:05,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:05,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211437809] [2021-03-10 20:32:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 20:32:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211437809] [2021-03-10 20:32:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130874376] [2021-03-10 20:32:05,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:05,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:32:05,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:05,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 20:32:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 20:32:05,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:05,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 20:32:05,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030138145] [2021-03-10 20:32:05,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 20:32:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 20:32:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 20:32:05,495 INFO L87 Difference]: Start difference. First operand 488 states and 952 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:05,588 INFO L93 Difference]: Finished difference Result 728 states and 1403 transitions. [2021-03-10 20:32:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 20:32:05,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 20:32:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:05,591 INFO L225 Difference]: With dead ends: 728 [2021-03-10 20:32:05,591 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 20:32:05,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:32:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 20:32:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 297. [2021-03-10 20:32:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.929054054054054) internal successors, (571), 296 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 571 transitions. [2021-03-10 20:32:05,600 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 571 transitions. Word has length 36 [2021-03-10 20:32:05,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:05,600 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 571 transitions. [2021-03-10 20:32:05,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 571 transitions. [2021-03-10 20:32:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:05,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:05,602 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:05,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 20:32:05,826 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1580118603, now seen corresponding path program 9 times [2021-03-10 20:32:05,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:05,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590927592] [2021-03-10 20:32:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:05,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590927592] [2021-03-10 20:32:05,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100431674] [2021-03-10 20:32:05,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:05,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 20:32:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 20:32:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:06,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:06,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 20:32:06,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614784956] [2021-03-10 20:32:06,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 20:32:06,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 20:32:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:32:06,041 INFO L87 Difference]: Start difference. First operand 297 states and 571 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:06,240 INFO L93 Difference]: Finished difference Result 982 states and 1931 transitions. [2021-03-10 20:32:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 20:32:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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 36 [2021-03-10 20:32:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:06,243 INFO L225 Difference]: With dead ends: 982 [2021-03-10 20:32:06,243 INFO L226 Difference]: Without dead ends: 495 [2021-03-10 20:32:06,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2021-03-10 20:32:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-10 20:32:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 318. [2021-03-10 20:32:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.9369085173501577) internal successors, (614), 317 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 614 transitions. [2021-03-10 20:32:06,252 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 614 transitions. Word has length 36 [2021-03-10 20:32:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:06,252 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 614 transitions. [2021-03-10 20:32:06,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 614 transitions. [2021-03-10 20:32:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:06,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:06,253 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:06,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:06,476 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:06,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:06,476 INFO L82 PathProgramCache]: Analyzing trace with hash -186879887, now seen corresponding path program 10 times [2021-03-10 20:32:06,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:06,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158172617] [2021-03-10 20:32:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:06,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158172617] [2021-03-10 20:32:06,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206914895] [2021-03-10 20:32:06,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:06,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 20:32:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 20:32:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:32:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:06,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:06,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 20:32:06,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667326621] [2021-03-10 20:32:06,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 20:32:06,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:06,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 20:32:06,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:32:06,682 INFO L87 Difference]: Start difference. First operand 318 states and 614 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:06,876 INFO L93 Difference]: Finished difference Result 960 states and 1883 transitions. [2021-03-10 20:32:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 20:32:06,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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 36 [2021-03-10 20:32:06,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:06,881 INFO L225 Difference]: With dead ends: 960 [2021-03-10 20:32:06,881 INFO L226 Difference]: Without dead ends: 395 [2021-03-10 20:32:06,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-03-10 20:32:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-03-10 20:32:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 274. [2021-03-10 20:32:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.9267399267399268) internal successors, (526), 273 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 526 transitions. [2021-03-10 20:32:06,889 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 526 transitions. Word has length 36 [2021-03-10 20:32:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:06,889 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 526 transitions. [2021-03-10 20:32:06,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 526 transitions. [2021-03-10 20:32:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:06,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:06,891 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:07,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:07,113 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash -460149865, now seen corresponding path program 11 times [2021-03-10 20:32:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:07,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197025493] [2021-03-10 20:32:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197025493] [2021-03-10 20:32:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543392798] [2021-03-10 20:32:07,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:32:07,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 20:32:07,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 20:32:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:07,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:07,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 20:32:07,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807853573] [2021-03-10 20:32:07,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 20:32:07,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:07,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 20:32:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:32:07,320 INFO L87 Difference]: Start difference. First operand 274 states and 526 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:07,530 INFO L93 Difference]: Finished difference Result 896 states and 1759 transitions. [2021-03-10 20:32:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 20:32:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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 36 [2021-03-10 20:32:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:07,533 INFO L225 Difference]: With dead ends: 896 [2021-03-10 20:32:07,533 INFO L226 Difference]: Without dead ends: 413 [2021-03-10 20:32:07,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-03-10 20:32:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-03-10 20:32:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 256. [2021-03-10 20:32:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.8823529411764706) internal successors, (480), 255 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 480 transitions. [2021-03-10 20:32:07,540 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 480 transitions. Word has length 36 [2021-03-10 20:32:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:07,540 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 480 transitions. [2021-03-10 20:32:07,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-03-10 20:32:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 480 transitions. [2021-03-10 20:32:07,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 20:32:07,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:07,541 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:07,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 20:32:07,763 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash 859444205, now seen corresponding path program 12 times [2021-03-10 20:32:07,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:07,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397322174] [2021-03-10 20:32:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:07,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397322174] [2021-03-10 20:32:07,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92710147] [2021-03-10 20:32:07,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:32:07,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 20:32:07,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:32:07,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:32:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:32:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:07,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:32:07,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 20:32:07,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870382353] [2021-03-10 20:32:07,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 20:32:07,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 20:32:07,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 20:32:07,937 INFO L87 Difference]: Start difference. First operand 256 states and 480 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-03-10 20:32:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:08,078 INFO L93 Difference]: Finished difference Result 413 states and 770 transitions. [2021-03-10 20:32:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 20:32:08,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 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 36 [2021-03-10 20:32:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:08,079 INFO L225 Difference]: With dead ends: 413 [2021-03-10 20:32:08,079 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 20:32:08,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-03-10 20:32:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 20:32:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 20:32:08,079 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) [2021-03-10 20:32:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 20:32:08,080 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-03-10 20:32:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:08,080 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 20:32:08,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-03-10 20:32:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 20:32:08,080 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 20:32:08,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 20:32:08,308 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:32:08 BasicIcfg [2021-03-10 20:32:08,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:32:08,309 INFO L168 Benchmark]: Toolchain (without parser) took 8153.13 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 236.6 MB in the beginning and 287.1 MB in the end (delta: -50.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 16.0 GB. [2021-03-10 20:32:08,309 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:32:08,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.33 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:32:08,309 INFO L168 Benchmark]: Boogie Preprocessor took 13.54 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 805.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:32:08,309 INFO L168 Benchmark]: RCFGBuilder took 188.80 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 238.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. [2021-03-10 20:32:08,309 INFO L168 Benchmark]: TraceAbstraction took 7917.84 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 237.7 MB in the beginning and 287.1 MB in the end (delta: -49.4 MB). Peak memory consumption was 52.8 MB. Max. memory is 16.0 GB. [2021-03-10 20:32:08,310 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 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.33 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.54 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 805.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 188.80 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 238.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 7917.84 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 237.7 MB in the beginning and 287.1 MB in the end (delta: -49.4 MB). Peak memory consumption was 52.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 22]: 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 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7836.6ms, OverallIterations: 14, TraceHistogramMax: 3, EmptinessCheckTime: 32.5ms, AutomataDifference: 2173.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 842 SDtfs, 2082 SDslu, 2576 SDs, 0 SdLazy, 1286 SolverSat, 270 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 754.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1522.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=550occurred in iteration=8, InterpolantAutomatonStates: 166, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 164.5ms AutomataMinimizationTime, 14 MinimizatonAttempts, 1866 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 67.7ms SsaConstructionTime, 224.0ms SatisfiabilityAnalysisTime, 2083.6ms InterpolantComputationTime, 808 NumberOfCodeBlocks, 804 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 2080 SizeOfPredicates, 72 NumberOfNonLiveVariables, 658 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 480/572 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...