/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 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 01:35:17,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 01:35:17,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 01:35:17,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 01:35:17,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 01:35:17,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 01:35:17,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 01:35:17,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 01:35:17,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 01:35:17,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 01:35:17,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 01:35:17,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 01:35:17,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 01:35:17,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 01:35:17,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 01:35:17,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 01:35:17,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 01:35:17,492 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 [2021-04-15 01:35:17,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 01:35:17,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 01:35:17,528 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 01:35:17,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 01:35:17,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 01:35:17,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 01:35:17,531 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 01:35:17,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 01:35:17,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 01:35:17,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 01:35:17,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 01:35:17,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 01:35:17,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 01:35:17,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 01:35:17,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 01:35:17,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 01:35:17,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 01:35:17,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 01:35:17,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 01:35:17,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 01:35:17,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 01:35:17,534 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 01:35:17,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 01:35:17,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 01:35:17,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 01:35:17,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 01:35:17,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 01:35:17,797 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 01:35:17,798 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 01:35:17,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/NonAtomicIncrement_2Threads_Loop.bpl [2021-04-15 01:35:17,799 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/NonAtomicIncrement_2Threads_Loop.bpl' [2021-04-15 01:35:17,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 01:35:17,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 01:35:17,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 01:35:17,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 01:35:17,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 01:35:17,836 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 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,840 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 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 01:35:17,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 01:35:17,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 01:35:17,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 01:35:17,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/1) ... [2021-04-15 01:35:17,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 01:35:17,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 01:35:17,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 01:35:17,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 01:35:17,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (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 [2021-04-15 01:35:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure fistIncrementProcess [2021-04-15 01:35:17,909 INFO L138 BoogieDeclarations]: Found implementation of procedure fistIncrementProcess [2021-04-15 01:35:17,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 01:35:17,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 01:35:17,909 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrementProcess [2021-04-15 01:35:17,909 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrementProcess [2021-04-15 01:35:17,910 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 01:35:18,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 01:35:18,056 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 01:35:18,057 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:35:18 BoogieIcfgContainer [2021-04-15 01:35:18,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 01:35:18,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 01:35:18,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 01:35:18,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 01:35:18,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 01:35:17" (1/2) ... [2021-04-15 01:35:18,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce4b93d and model type NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 01:35:18, skipping insertion in model container [2021-04-15 01:35:18,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:35:18" (2/2) ... [2021-04-15 01:35:18,062 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads_Loop.bpl [2021-04-15 01:35:18,065 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 01:35:18,065 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 01:35:18,082 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 01:35:18,082 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 01:35:18,118 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,118 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,118 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,119 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,119 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,119 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,119 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,119 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,119 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,119 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,120 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,120 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,120 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,120 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,120 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,120 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,120 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,121 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,121 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,121 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,121 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,121 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,121 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,121 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,122 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,122 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,122 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,122 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,123 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,123 WARN L313 ript$VariableManager]: TermVariabe fistIncrementProcessThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,126 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,126 WARN L313 ript$VariableManager]: TermVariabe secondIncrementProcessThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:35:18,157 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 01:35:18,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 01:35:18,185 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 01:35:18,185 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 01:35:18,185 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 01:35:18,185 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 01:35:18,185 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 01:35:18,185 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 01:35:18,185 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 01:35:18,185 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 01:35:18,191 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 26 transitions, 74 flow [2021-04-15 01:35:18,201 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) [2021-04-15 01:35:18,202 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) [2021-04-15 01:35:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 01:35:18,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:18,208 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:18,208 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:18,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1220513213, now seen corresponding path program 1 times [2021-04-15 01:35:18,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:18,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875041109] [2021-04-15 01:35:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:18,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875041109] [2021-04-15 01:35:18,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:35:18,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 01:35:18,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850362500] [2021-04-15 01:35:18,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:35:18,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:35:18,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:35:18,336 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) [2021-04-15 01:35:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:18,376 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-04-15 01:35:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:35:18,377 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 [2021-04-15 01:35:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:18,393 INFO L225 Difference]: With dead ends: 112 [2021-04-15 01:35:18,393 INFO L226 Difference]: Without dead ends: 110 [2021-04-15 01:35:18,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:35:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-04-15 01:35:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2021-04-15 01:35:18,430 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) [2021-04-15 01:35:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 163 transitions. [2021-04-15 01:35:18,434 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 163 transitions. Word has length 12 [2021-04-15 01:35:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:18,434 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 163 transitions. [2021-04-15 01:35:18,435 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) [2021-04-15 01:35:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 163 transitions. [2021-04-15 01:35:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 01:35:18,437 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:18,437 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:18,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 01:35:18,438 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1970774266, now seen corresponding path program 1 times [2021-04-15 01:35:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:18,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935566698] [2021-04-15 01:35:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:18,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935566698] [2021-04-15 01:35:18,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166244433] [2021-04-15 01:35:18,494 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 [2021-04-15 01:35:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-04-15 01:35:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 01:35:18,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 01:35:18,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-04-15 01:35:18,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81745257] [2021-04-15 01:35:18,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:35:18,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:18,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:35:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 01:35:18,571 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) [2021-04-15 01:35:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:18,591 INFO L93 Difference]: Finished difference Result 119 states and 235 transitions. [2021-04-15 01:35:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:35:18,593 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 [2021-04-15 01:35:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:18,594 INFO L225 Difference]: With dead ends: 119 [2021-04-15 01:35:18,594 INFO L226 Difference]: Without dead ends: 119 [2021-04-15 01:35:18,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 01:35:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-04-15 01:35:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2021-04-15 01:35:18,600 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) [2021-04-15 01:35:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 181 transitions. [2021-04-15 01:35:18,600 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 181 transitions. Word has length 16 [2021-04-15 01:35:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:18,601 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 181 transitions. [2021-04-15 01:35:18,601 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) [2021-04-15 01:35:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 181 transitions. [2021-04-15 01:35:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 01:35:18,601 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:18,601 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:18,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 01:35:18,803 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:18,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1734067575, now seen corresponding path program 1 times [2021-04-15 01:35:18,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:18,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371431336] [2021-04-15 01:35:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 01:35:18,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371431336] [2021-04-15 01:35:18,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565610905] [2021-04-15 01:35:18,828 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 [2021-04-15 01:35:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 01:35:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 01:35:18,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:18,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 01:35:18,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426553990] [2021-04-15 01:35:18,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 01:35:18,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:18,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 01:35:18,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 01:35:18,941 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) [2021-04-15 01:35:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:18,967 INFO L93 Difference]: Finished difference Result 162 states and 321 transitions. [2021-04-15 01:35:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 01:35:18,968 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 [2021-04-15 01:35:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:18,969 INFO L225 Difference]: With dead ends: 162 [2021-04-15 01:35:18,969 INFO L226 Difference]: Without dead ends: 162 [2021-04-15 01:35:18,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 01:35:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-04-15 01:35:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-04-15 01:35:18,980 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) [2021-04-15 01:35:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 261 transitions. [2021-04-15 01:35:18,981 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 261 transitions. Word has length 20 [2021-04-15 01:35:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:18,981 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 261 transitions. [2021-04-15 01:35:18,981 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) [2021-04-15 01:35:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 261 transitions. [2021-04-15 01:35:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 01:35:18,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:18,982 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:19,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:19,189 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 996193356, now seen corresponding path program 2 times [2021-04-15 01:35:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:19,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994862603] [2021-04-15 01:35:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 01:35:19,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994862603] [2021-04-15 01:35:19,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157318139] [2021-04-15 01:35:19,211 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 [2021-04-15 01:35:19,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:35:19,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 01:35:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 01:35:19,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:19,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 01:35:19,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261099288] [2021-04-15 01:35:19,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 01:35:19,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:19,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 01:35:19,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 01:35:19,312 INFO L87 Difference]: Start difference. First operand 132 states and 261 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) [2021-04-15 01:35:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:19,326 INFO L93 Difference]: Finished difference Result 223 states and 443 transitions. [2021-04-15 01:35:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 01:35:19,327 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 24 [2021-04-15 01:35:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:19,328 INFO L225 Difference]: With dead ends: 223 [2021-04-15 01:35:19,328 INFO L226 Difference]: Without dead ends: 223 [2021-04-15 01:35:19,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 01:35:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-04-15 01:35:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 184. [2021-04-15 01:35:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.994535519125683) internal successors, (365), 183 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:35:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 365 transitions. [2021-04-15 01:35:19,339 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 365 transitions. Word has length 24 [2021-04-15 01:35:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:19,340 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 365 transitions. [2021-04-15 01:35:19,340 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) [2021-04-15 01:35:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 365 transitions. [2021-04-15 01:35:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 01:35:19,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:19,341 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:19,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:19,552 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:19,552 INFO L82 PathProgramCache]: Analyzing trace with hash -819692337, now seen corresponding path program 3 times [2021-04-15 01:35:19,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:19,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745788622] [2021-04-15 01:35:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 01:35:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745788622] [2021-04-15 01:35:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124866059] [2021-04-15 01:35:19,579 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 [2021-04-15 01:35:19,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 01:35:19,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:19,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 01:35:19,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 01:35:19,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:19,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 01:35:19,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723144406] [2021-04-15 01:35:19,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 01:35:19,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:19,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 01:35:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 01:35:19,661 INFO L87 Difference]: Start difference. First operand 184 states and 365 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:35:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:19,817 INFO L93 Difference]: Finished difference Result 308 states and 613 transitions. [2021-04-15 01:35:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 01:35:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 01:35:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:19,820 INFO L225 Difference]: With dead ends: 308 [2021-04-15 01:35:19,820 INFO L226 Difference]: Without dead ends: 308 [2021-04-15 01:35:19,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 01:35:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-04-15 01:35:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-04-15 01:35:19,860 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) [2021-04-15 01:35:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 613 transitions. [2021-04-15 01:35:19,861 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 613 transitions. Word has length 28 [2021-04-15 01:35:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:19,861 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 613 transitions. [2021-04-15 01:35:19,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:35:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 613 transitions. [2021-04-15 01:35:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:19,863 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:19,863 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:20,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:20,078 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash -677955307, now seen corresponding path program 4 times [2021-04-15 01:35:20,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:20,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894533802] [2021-04-15 01:35:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:20,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894533802] [2021-04-15 01:35:20,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:35:20,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-04-15 01:35:20,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520059192] [2021-04-15 01:35:20,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 01:35:20,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 01:35:20,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-15 01:35:20,189 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) [2021-04-15 01:35:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:20,400 INFO L93 Difference]: Finished difference Result 1129 states and 2254 transitions. [2021-04-15 01:35:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 01:35:20,400 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 [2021-04-15 01:35:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:20,402 INFO L225 Difference]: With dead ends: 1129 [2021-04-15 01:35:20,402 INFO L226 Difference]: Without dead ends: 572 [2021-04-15 01:35:20,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-04-15 01:35:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-04-15 01:35:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 365. [2021-04-15 01:35:20,412 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) [2021-04-15 01:35:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 719 transitions. [2021-04-15 01:35:20,413 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 719 transitions. Word has length 36 [2021-04-15 01:35:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:20,413 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 719 transitions. [2021-04-15 01:35:20,413 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) [2021-04-15 01:35:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 719 transitions. [2021-04-15 01:35:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:20,415 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:20,415 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:20,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 01:35:20,415 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1337752009, now seen corresponding path program 5 times [2021-04-15 01:35:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:20,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908767548] [2021-04-15 01:35:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:20,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908767548] [2021-04-15 01:35:20,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360734167] [2021-04-15 01:35:20,500 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 [2021-04-15 01:35:20,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 01:35:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:35:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:20,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:20,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 01:35:20,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506946606] [2021-04-15 01:35:20,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:35:20,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:35:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:35:20,614 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) [2021-04-15 01:35:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:20,808 INFO L93 Difference]: Finished difference Result 1051 states and 2075 transitions. [2021-04-15 01:35:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 01:35:20,808 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 [2021-04-15 01:35:20,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:20,810 INFO L225 Difference]: With dead ends: 1051 [2021-04-15 01:35:20,810 INFO L226 Difference]: Without dead ends: 491 [2021-04-15 01:35:20,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2021-04-15 01:35:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-04-15 01:35:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 331. [2021-04-15 01:35:20,816 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) [2021-04-15 01:35:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 645 transitions. [2021-04-15 01:35:20,817 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 645 transitions. Word has length 36 [2021-04-15 01:35:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:20,817 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 645 transitions. [2021-04-15 01:35:20,817 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) [2021-04-15 01:35:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 645 transitions. [2021-04-15 01:35:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:20,818 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:20,818 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:21,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-04-15 01:35:21,033 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:21,034 INFO L82 PathProgramCache]: Analyzing trace with hash 31796177, now seen corresponding path program 6 times [2021-04-15 01:35:21,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:21,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215399589] [2021-04-15 01:35:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215399589] [2021-04-15 01:35:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032928866] [2021-04-15 01:35:21,199 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 [2021-04-15 01:35:21,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 01:35:21,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:21,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:35:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:21,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:21,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 01:35:21,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050699196] [2021-04-15 01:35:21,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:35:21,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:21,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:35:21,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:35:21,373 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) [2021-04-15 01:35:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:21,572 INFO L93 Difference]: Finished difference Result 1357 states and 2666 transitions. [2021-04-15 01:35:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 01:35:21,572 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 [2021-04-15 01:35:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:21,576 INFO L225 Difference]: With dead ends: 1357 [2021-04-15 01:35:21,576 INFO L226 Difference]: Without dead ends: 1011 [2021-04-15 01:35:21,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-04-15 01:35:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-04-15 01:35:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 550. [2021-04-15 01:35:21,587 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) [2021-04-15 01:35:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1085 transitions. [2021-04-15 01:35:21,589 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1085 transitions. Word has length 36 [2021-04-15 01:35:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:21,590 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1085 transitions. [2021-04-15 01:35:21,590 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) [2021-04-15 01:35:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1085 transitions. [2021-04-15 01:35:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:21,592 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:21,593 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:21,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:21,801 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1184609583, now seen corresponding path program 7 times [2021-04-15 01:35:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:21,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286543437] [2021-04-15 01:35:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:21,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286543437] [2021-04-15 01:35:21,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058082305] [2021-04-15 01:35:21,873 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 01:35:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:21,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:21,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 01:35:21,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455821580] [2021-04-15 01:35:21,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 01:35:21,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:21,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 01:35:21,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 01:35:21,984 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) [2021-04-15 01:35:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:22,130 INFO L93 Difference]: Finished difference Result 976 states and 1894 transitions. [2021-04-15 01:35:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 01:35:22,130 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 [2021-04-15 01:35:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:22,133 INFO L225 Difference]: With dead ends: 976 [2021-04-15 01:35:22,133 INFO L226 Difference]: Without dead ends: 782 [2021-04-15 01:35:22,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-04-15 01:35:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-04-15 01:35:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 488. [2021-04-15 01:35:22,142 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) [2021-04-15 01:35:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 952 transitions. [2021-04-15 01:35:22,143 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 952 transitions. Word has length 36 [2021-04-15 01:35:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:22,143 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 952 transitions. [2021-04-15 01:35:22,143 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) [2021-04-15 01:35:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 952 transitions. [2021-04-15 01:35:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:22,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:22,144 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:22,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:22,364 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1312549329, now seen corresponding path program 8 times [2021-04-15 01:35:22,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:22,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571618597] [2021-04-15 01:35:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 01:35:22,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571618597] [2021-04-15 01:35:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882800709] [2021-04-15 01:35:22,422 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 [2021-04-15 01:35:22,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:35:22,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 01:35:22,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 01:35:22,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:22,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 01:35:22,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483270916] [2021-04-15 01:35:22,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 01:35:22,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:22,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 01:35:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 01:35:22,503 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) [2021-04-15 01:35:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:22,606 INFO L93 Difference]: Finished difference Result 728 states and 1403 transitions. [2021-04-15 01:35:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 01:35:22,606 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 [2021-04-15 01:35:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:22,609 INFO L225 Difference]: With dead ends: 728 [2021-04-15 01:35:22,609 INFO L226 Difference]: Without dead ends: 451 [2021-04-15 01:35:22,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-04-15 01:35:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-04-15 01:35:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 297. [2021-04-15 01:35:22,616 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) [2021-04-15 01:35:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 571 transitions. [2021-04-15 01:35:22,616 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 571 transitions. Word has length 36 [2021-04-15 01:35:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:22,617 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 571 transitions. [2021-04-15 01:35:22,617 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) [2021-04-15 01:35:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 571 transitions. [2021-04-15 01:35:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:22,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:22,617 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:22,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 01:35:22,830 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:22,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1197050773, now seen corresponding path program 9 times [2021-04-15 01:35:22,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:22,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462432192] [2021-04-15 01:35:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:22,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462432192] [2021-04-15 01:35:22,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870789220] [2021-04-15 01:35:22,902 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 [2021-04-15 01:35:22,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 01:35:22,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:35:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:22,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:22,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 01:35:22,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75394931] [2021-04-15 01:35:22,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:35:22,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:35:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:35:22,988 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) [2021-04-15 01:35:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:23,142 INFO L93 Difference]: Finished difference Result 982 states and 1931 transitions. [2021-04-15 01:35:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 01:35:23,142 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 [2021-04-15 01:35:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:23,145 INFO L225 Difference]: With dead ends: 982 [2021-04-15 01:35:23,145 INFO L226 Difference]: Without dead ends: 495 [2021-04-15 01:35:23,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2021-04-15 01:35:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-04-15 01:35:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 318. [2021-04-15 01:35:23,151 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) [2021-04-15 01:35:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 614 transitions. [2021-04-15 01:35:23,152 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 614 transitions. Word has length 36 [2021-04-15 01:35:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:23,152 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 614 transitions. [2021-04-15 01:35:23,152 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) [2021-04-15 01:35:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 614 transitions. [2021-04-15 01:35:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:23,152 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:23,153 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:23,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:23,377 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1330918033, now seen corresponding path program 10 times [2021-04-15 01:35:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:23,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226324618] [2021-04-15 01:35:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:23,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226324618] [2021-04-15 01:35:23,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706722602] [2021-04-15 01:35:23,466 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) [2021-04-15 01:35:23,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:35:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:35:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:23,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:23,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 01:35:23,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72196001] [2021-04-15 01:35:23,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:35:23,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:23,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:35:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:35:23,550 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) [2021-04-15 01:35:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:23,699 INFO L93 Difference]: Finished difference Result 960 states and 1883 transitions. [2021-04-15 01:35:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 01:35:23,699 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 [2021-04-15 01:35:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:23,701 INFO L225 Difference]: With dead ends: 960 [2021-04-15 01:35:23,701 INFO L226 Difference]: Without dead ends: 395 [2021-04-15 01:35:23,701 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-04-15 01:35:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-04-15 01:35:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 274. [2021-04-15 01:35:23,705 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) [2021-04-15 01:35:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 526 transitions. [2021-04-15 01:35:23,706 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 526 transitions. Word has length 36 [2021-04-15 01:35:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:23,706 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 526 transitions. [2021-04-15 01:35:23,706 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) [2021-04-15 01:35:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 526 transitions. [2021-04-15 01:35:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:23,707 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:23,707 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:23,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:23,911 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:23,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1057648055, now seen corresponding path program 11 times [2021-04-15 01:35:23,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:23,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421419315] [2021-04-15 01:35:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421419315] [2021-04-15 01:35:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425844315] [2021-04-15 01:35:23,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:24,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 01:35:24,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:35:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:24,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:24,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 01:35:24,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73481994] [2021-04-15 01:35:24,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:35:24,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:35:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:35:24,076 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) [2021-04-15 01:35:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:24,228 INFO L93 Difference]: Finished difference Result 896 states and 1759 transitions. [2021-04-15 01:35:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 01:35:24,228 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 [2021-04-15 01:35:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:24,229 INFO L225 Difference]: With dead ends: 896 [2021-04-15 01:35:24,230 INFO L226 Difference]: Without dead ends: 413 [2021-04-15 01:35:24,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-04-15 01:35:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-04-15 01:35:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 256. [2021-04-15 01:35:24,235 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) [2021-04-15 01:35:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 480 transitions. [2021-04-15 01:35:24,236 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 480 transitions. Word has length 36 [2021-04-15 01:35:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:24,236 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 480 transitions. [2021-04-15 01:35:24,236 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) [2021-04-15 01:35:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 480 transitions. [2021-04-15 01:35:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:35:24,237 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:35:24,237 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:35:24,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 01:35:24,451 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:35:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:35:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1917725171, now seen corresponding path program 12 times [2021-04-15 01:35:24,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:35:24,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426966669] [2021-04-15 01:35:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:35:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:35:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:24,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426966669] [2021-04-15 01:35:24,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958345517] [2021-04-15 01:35:24,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:35:24,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 01:35:24,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:35:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 01:35:24,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:35:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:35:24,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:35:24,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 01:35:24,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856580775] [2021-04-15 01:35:24,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 01:35:24,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:35:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 01:35:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 01:35:24,612 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) [2021-04-15 01:35:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:35:24,714 INFO L93 Difference]: Finished difference Result 413 states and 770 transitions. [2021-04-15 01:35:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 01:35:24,714 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 [2021-04-15 01:35:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:35:24,714 INFO L225 Difference]: With dead ends: 413 [2021-04-15 01:35:24,714 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 01:35:24,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-04-15 01:35:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 01:35:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 01:35:24,715 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) [2021-04-15 01:35:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 01:35:24,715 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-04-15 01:35:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:35:24,715 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 01:35:24,715 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) [2021-04-15 01:35:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 01:35:24,715 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 01:35:24,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 01:35:24,932 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads_Loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 01:35:24 BasicIcfg [2021-04-15 01:35:24,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 01:35:24,933 INFO L168 Benchmark]: Toolchain (without parser) took 7105.56 ms. Allocated memory was 255.9 MB in the beginning and 421.5 MB in the end (delta: 165.7 MB). Free memory was 236.7 MB in the beginning and 335.5 MB in the end (delta: -98.9 MB). Peak memory consumption was 68.2 MB. Max. memory is 16.0 GB. [2021-04-15 01:35:24,933 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 01:35:24,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 01:35:24,933 INFO L168 Benchmark]: Boogie Preprocessor took 10.12 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.2 MB in the end (delta: 883.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 01:35:24,933 INFO L168 Benchmark]: RCFGBuilder took 200.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 241.0 MB in the end (delta: -6.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. [2021-04-15 01:35:24,933 INFO L168 Benchmark]: TraceAbstraction took 6873.72 ms. Allocated memory was 255.9 MB in the beginning and 421.5 MB in the end (delta: 165.7 MB). Free memory was 240.5 MB in the beginning and 335.5 MB in the end (delta: -95.1 MB). Peak memory consumption was 71.3 MB. Max. memory is 16.0 GB. [2021-04-15 01:35:24,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.12 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.2 MB in the end (delta: 883.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 200.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 241.0 MB in the end (delta: -6.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 6873.72 ms. Allocated memory was 255.9 MB in the beginning and 421.5 MB in the end (delta: 165.7 MB). Free memory was 240.5 MB in the beginning and 335.5 MB in the end (delta: -95.1 MB). Peak memory consumption was 71.3 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: 6746.0ms, OverallIterations: 14, TraceHistogramMax: 3, EmptinessCheckTime: 18.8ms, AutomataDifference: 1738.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 842 SDtfs, 2389 SDslu, 2161 SDs, 0 SdLazy, 1107 SolverSat, 290 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 562.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 591 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1254.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=550occurred in iteration=8, InterpolantAutomatonStates: 169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.4ms AutomataMinimizationTime, 14 MinimizatonAttempts, 1854 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 52.1ms SsaConstructionTime, 220.0ms SatisfiabilityAnalysisTime, 1675.6ms InterpolantComputationTime, 800 NumberOfCodeBlocks, 800 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 774 ConstructedInterpolants, 0 QuantifiedInterpolants, 2064 SizeOfPredicates, 72 NumberOfNonLiveVariables, 658 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 467/554 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...