/usr/bin/java -Xmx8000000000 -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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/Fischer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98196c323137eee61a7c1131837b356358d783d4-98196c3 [2021-06-16 16:33:33,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-16 16:33:33,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-16 16:33:33,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-16 16:33:33,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-16 16:33:33,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-16 16:33:33,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-16 16:33:33,256 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-Delay.epf [2021-06-16 16:33:33,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-16 16:33:33,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-16 16:33:33,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-16 16:33:33,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-16 16:33:33,294 INFO L138 SettingsManager]: * Use SBE=true [2021-06-16 16:33:33,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-16 16:33:33,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-16 16:33:33,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-16 16:33:33,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-16 16:33:33,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-16 16:33:33,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-16 16:33:33,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-16 16:33:33,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-16 16:33:33,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-16 16:33:33,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-16 16:33:33,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-16 16:33:33,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-16 16:33:33,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-16 16:33:33,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-16 16:33:33,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-16 16:33:33,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-16 16:33:33,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-16 16:33:33,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-16 16:33:33,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-16 16:33:33,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-16 16:33:33,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-16 16:33:33,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-16 16:33:33,299 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-16 16:33:33,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-16 16:33:33,299 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-16 16:33:33,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-16 16:33:33,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-16 16:33:33,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-16 16:33:33,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-16 16:33:33,661 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-16 16:33:33,662 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-16 16:33:33,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Fischer.bpl [2021-06-16 16:33:33,664 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Fischer.bpl' [2021-06-16 16:33:33,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-16 16:33:33,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-16 16:33:33,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-16 16:33:33,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-16 16:33:33,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-16 16:33:33,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-16 16:33:33,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-16 16:33:33,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-16 16:33:33,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-16 16:33:33,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/1) ... [2021-06-16 16:33:33,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-16 16:33:33,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-16 16:33:33,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-16 16:33:33,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-16 16:33:33,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (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 [2021-06-16 16:33:33,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process2 given in one single declaration [2021-06-16 16:33:33,842 INFO L130 BoogieDeclarations]: Found specification of procedure Process2 [2021-06-16 16:33:33,843 INFO L138 BoogieDeclarations]: Found implementation of procedure Process2 [2021-06-16 16:33:33,843 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-16 16:33:33,843 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-16 16:33:33,843 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-16 16:33:33,843 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-16 16:33:33,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-16 16:33:33,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-16 16:33:33,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Clock given in one single declaration [2021-06-16 16:33:33,844 INFO L130 BoogieDeclarations]: Found specification of procedure Clock [2021-06-16 16:33:33,844 INFO L138 BoogieDeclarations]: Found implementation of procedure Clock [2021-06-16 16:33:33,845 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-16 16:33:34,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-16 16:33:34,006 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-16 16:33:34,008 INFO L202 PluginConnector]: Adding new model Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:33:34 BoogieIcfgContainer [2021-06-16 16:33:34,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-16 16:33:34,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-16 16:33:34,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-16 16:33:34,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-16 16:33:34,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:33" (1/2) ... [2021-06-16 16:33:34,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5bd84e and model type Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.06 04:33:34, skipping insertion in model container [2021-06-16 16:33:34,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:33:34" (2/2) ... [2021-06-16 16:33:34,014 INFO L111 eAbstractionObserver]: Analyzing ICFG Fischer.bpl [2021-06-16 16:33:34,025 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-16 16:33:34,025 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-16 16:33:34,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-16 16:33:34,026 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-16 16:33:34,074 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,075 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,076 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,076 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,076 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,076 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,077 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,077 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,078 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,078 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,079 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,079 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,079 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,080 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,080 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,080 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,106 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,108 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:33:34,109 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-16 16:33:34,127 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:34,143 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:34,144 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:34,144 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:34,144 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:34,144 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:34,144 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:34,144 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:34,144 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process2Thread1of1ForFork2======== [2021-06-16 16:33:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1395 states have (on average 3.1591397849462366) internal successors, (4407), 1402 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-16 16:33:34,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:34,593 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:34,594 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash -173258256, now seen corresponding path program 1 times [2021-06-16 16:33:34,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:34,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549858156] [2021-06-16 16:33:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:34,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:34,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:34,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:34,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549858156] [2021-06-16 16:33:34,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549858156] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:34,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:34,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-16 16:33:34,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428350840] [2021-06-16 16:33:34,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:34,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:34,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:34,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:34,756 INFO L87 Difference]: Start difference. First operand has 1403 states, 1395 states have (on average 3.1591397849462366) internal successors, (4407), 1402 states have internal predecessors, (4407), 0 states have call successors, (0), 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, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:34,826 INFO L93 Difference]: Finished difference Result 398 states and 1203 transitions. [2021-06-16 16:33:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-06-16 16:33:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:34,857 INFO L225 Difference]: With dead ends: 398 [2021-06-16 16:33:34,857 INFO L226 Difference]: Without dead ends: 374 [2021-06-16 16:33:34,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-16 16:33:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 350. [2021-06-16 16:33:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 350 states have (on average 3.0742857142857143) internal successors, (1076), 349 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1076 transitions. [2021-06-16 16:33:34,916 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1076 transitions. Word has length 9 [2021-06-16 16:33:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:34,917 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1076 transitions. [2021-06-16 16:33:34,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1076 transitions. [2021-06-16 16:33:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:34,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:34,918 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:34,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-16 16:33:34,919 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:34,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:34,919 INFO L82 PathProgramCache]: Analyzing trace with hash 403321209, now seen corresponding path program 1 times [2021-06-16 16:33:34,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:34,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653967668] [2021-06-16 16:33:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:34,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:34,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:34,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:34,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:34,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:34,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:34,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:34,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653967668] [2021-06-16 16:33:34,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653967668] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:34,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:34,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:34,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657113760] [2021-06-16 16:33:34,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:34,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:34,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:34,945 INFO L87 Difference]: Start difference. First operand 350 states and 1076 transitions. 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) [2021-06-16 16:33:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:34,987 INFO L93 Difference]: Finished difference Result 560 states and 1676 transitions. [2021-06-16 16:33:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:34,987 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 [2021-06-16 16:33:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:34,992 INFO L225 Difference]: With dead ends: 560 [2021-06-16 16:33:34,992 INFO L226 Difference]: Without dead ends: 464 [2021-06-16 16:33:34,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-16 16:33:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 356. [2021-06-16 16:33:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 356 states have (on average 2.898876404494382) internal successors, (1032), 355 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1032 transitions. [2021-06-16 16:33:35,030 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1032 transitions. Word has length 12 [2021-06-16 16:33:35,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,034 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1032 transitions. [2021-06-16 16:33:35,034 INFO L483 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) [2021-06-16 16:33:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1032 transitions. [2021-06-16 16:33:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:35,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:35,036 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:35,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-16 16:33:35,038 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1014496749, now seen corresponding path program 2 times [2021-06-16 16:33:35,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555967139] [2021-06-16 16:33:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:35,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,059 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:35,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:35,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555967139] [2021-06-16 16:33:35,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555967139] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:35,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:35,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:35,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934090014] [2021-06-16 16:33:35,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:35,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:35,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:35,072 INFO L87 Difference]: Start difference. First operand 356 states and 1032 transitions. 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) [2021-06-16 16:33:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:35,108 INFO L93 Difference]: Finished difference Result 458 states and 1320 transitions. [2021-06-16 16:33:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:35,109 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 [2021-06-16 16:33:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:35,111 INFO L225 Difference]: With dead ends: 458 [2021-06-16 16:33:35,111 INFO L226 Difference]: Without dead ends: 458 [2021-06-16 16:33:35,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-16 16:33:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 412. [2021-06-16 16:33:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 412 states have (on average 2.8737864077669903) internal successors, (1184), 411 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1184 transitions. [2021-06-16 16:33:35,126 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1184 transitions. Word has length 12 [2021-06-16 16:33:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,127 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1184 transitions. [2021-06-16 16:33:35,127 INFO L483 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) [2021-06-16 16:33:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1184 transitions. [2021-06-16 16:33:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-16 16:33:35,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:35,132 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:35,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-16 16:33:35,133 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1612610670, now seen corresponding path program 1 times [2021-06-16 16:33:35,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:35,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523165764] [2021-06-16 16:33:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:35,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:35,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:35,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:35,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523165764] [2021-06-16 16:33:35,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523165764] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:35,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:35,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:35,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674942147] [2021-06-16 16:33:35,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:35,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:35,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:35,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:35,179 INFO L87 Difference]: Start difference. First operand 412 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:35,203 INFO L93 Difference]: Finished difference Result 484 states and 1390 transitions. [2021-06-16 16:33:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-16 16:33:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:35,207 INFO L225 Difference]: With dead ends: 484 [2021-06-16 16:33:35,208 INFO L226 Difference]: Without dead ends: 484 [2021-06-16 16:33:35,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-16 16:33:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 460. [2021-06-16 16:33:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 460 states have (on average 2.865217391304348) internal successors, (1318), 459 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1318 transitions. [2021-06-16 16:33:35,223 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1318 transitions. Word has length 19 [2021-06-16 16:33:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,224 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1318 transitions. [2021-06-16 16:33:35,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1318 transitions. [2021-06-16 16:33:35,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-16 16:33:35,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:35,225 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:35,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-16 16:33:35,225 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash -654193678, now seen corresponding path program 2 times [2021-06-16 16:33:35,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:35,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131507531] [2021-06-16 16:33:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:35,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:35,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:35,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:35,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131507531] [2021-06-16 16:33:35,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131507531] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:35,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:35,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:35,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862004016] [2021-06-16 16:33:35,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:35,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:35,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:35,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:35,270 INFO L87 Difference]: Start difference. First operand 460 states and 1318 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:35,310 INFO L93 Difference]: Finished difference Result 490 states and 1383 transitions. [2021-06-16 16:33:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-16 16:33:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:35,313 INFO L225 Difference]: With dead ends: 490 [2021-06-16 16:33:35,313 INFO L226 Difference]: Without dead ends: 394 [2021-06-16 16:33:35,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-16 16:33:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 374. [2021-06-16 16:33:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 374 states have (on average 2.783422459893048) internal successors, (1041), 373 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1041 transitions. [2021-06-16 16:33:35,325 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1041 transitions. Word has length 19 [2021-06-16 16:33:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,325 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1041 transitions. [2021-06-16 16:33:35,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1041 transitions. [2021-06-16 16:33:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-16 16:33:35,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:35,326 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:35,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-16 16:33:35,326 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash 845750021, now seen corresponding path program 1 times [2021-06-16 16:33:35,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:35,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640136294] [2021-06-16 16:33:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:35,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:35,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:35,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:35,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640136294] [2021-06-16 16:33:35,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640136294] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:35,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:35,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:35,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922205498] [2021-06-16 16:33:35,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:35,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:35,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:35,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:35,358 INFO L87 Difference]: Start difference. First operand 374 states and 1041 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:35,397 INFO L93 Difference]: Finished difference Result 392 states and 1071 transitions. [2021-06-16 16:33:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-16 16:33:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:35,400 INFO L225 Difference]: With dead ends: 392 [2021-06-16 16:33:35,400 INFO L226 Difference]: Without dead ends: 392 [2021-06-16 16:33:35,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-16 16:33:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2021-06-16 16:33:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 392 states have (on average 2.732142857142857) internal successors, (1071), 391 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1071 transitions. [2021-06-16 16:33:35,414 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1071 transitions. Word has length 26 [2021-06-16 16:33:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,415 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1071 transitions. [2021-06-16 16:33:35,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1071 transitions. [2021-06-16 16:33:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-16 16:33:35,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:35,416 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:35,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-16 16:33:35,416 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1735664078, now seen corresponding path program 1 times [2021-06-16 16:33:35,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:35,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002585410] [2021-06-16 16:33:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:35,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-16 16:33:35,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:35,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002585410] [2021-06-16 16:33:35,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002585410] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:35,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:35,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:35,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848066471] [2021-06-16 16:33:35,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:35,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:35,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:35,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:35,491 INFO L87 Difference]: Start difference. First operand 392 states and 1071 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:35,599 INFO L93 Difference]: Finished difference Result 462 states and 1223 transitions. [2021-06-16 16:33:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-06-16 16:33:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:35,602 INFO L225 Difference]: With dead ends: 462 [2021-06-16 16:33:35,602 INFO L226 Difference]: Without dead ends: 378 [2021-06-16 16:33:35,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-16 16:33:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-16 16:33:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-06-16 16:33:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 378 states have (on average 2.7433862433862433) internal successors, (1037), 377 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1037 transitions. [2021-06-16 16:33:35,617 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1037 transitions. Word has length 27 [2021-06-16 16:33:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,617 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1037 transitions. [2021-06-16 16:33:35,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1037 transitions. [2021-06-16 16:33:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-16 16:33:35,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:35,619 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:35,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-16 16:33:35,619 INFO L430 AbstractCegarLoop]: === Iteration 8 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash 545117126, now seen corresponding path program 2 times [2021-06-16 16:33:35,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:35,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450753174] [2021-06-16 16:33:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:35,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,655 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:35,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:35,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:35,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450753174] [2021-06-16 16:33:35,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450753174] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:35,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:35,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:35,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746280426] [2021-06-16 16:33:35,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:35,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:35,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:35,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:35,669 INFO L87 Difference]: Start difference. First operand 378 states and 1037 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:35,695 INFO L93 Difference]: Finished difference Result 397 states and 1068 transitions. [2021-06-16 16:33:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-06-16 16:33:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:35,698 INFO L225 Difference]: With dead ends: 397 [2021-06-16 16:33:35,698 INFO L226 Difference]: Without dead ends: 397 [2021-06-16 16:33:35,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-16 16:33:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2021-06-16 16:33:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 397 states have (on average 2.690176322418136) internal successors, (1068), 396 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1068 transitions. [2021-06-16 16:33:35,709 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1068 transitions. Word has length 27 [2021-06-16 16:33:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,710 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1068 transitions. [2021-06-16 16:33:35,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1068 transitions. [2021-06-16 16:33:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-16 16:33:35,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:35,712 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:35,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-16 16:33:35,713 INFO L430 AbstractCegarLoop]: === Iteration 9 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1588639655, now seen corresponding path program 3 times [2021-06-16 16:33:35,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:35,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770073783] [2021-06-16 16:33:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:35,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-16 16:33:35,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:35,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:35,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:35,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770073783] [2021-06-16 16:33:35,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770073783] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:35,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:35,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:35,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685598484] [2021-06-16 16:33:35,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:35,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:35,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:35,793 INFO L87 Difference]: Start difference. First operand 397 states and 1068 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:35,884 INFO L93 Difference]: Finished difference Result 239 states and 597 transitions. [2021-06-16 16:33:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-16 16:33:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:35,885 INFO L225 Difference]: With dead ends: 239 [2021-06-16 16:33:35,885 INFO L226 Difference]: Without dead ends: 0 [2021-06-16 16:33:35,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-16 16:33:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-16 16:33:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-16 16:33:35,885 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) [2021-06-16 16:33:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-16 16:33:35,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-16 16:33:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:35,886 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-16 16:33:35,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-16 16:33:35,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:35,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-16 16:33:35,887 INFO L301 ceAbstractionStarter]: Result for error location Process2Thread1of1ForFork2 was SAFE (1/5) [2021-06-16 16:33:35,888 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:35,889 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:35,889 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:35,889 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:35,889 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:35,889 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:35,889 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:35,890 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:35,890 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process2======== [2021-06-16 16:33:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1395 states have (on average 3.1591397849462366) internal successors, (4407), 1402 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:36,076 INFO L301 ceAbstractionStarter]: Result for error location Process2 was SAFE (2/5) [2021-06-16 16:33:36,077 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:36,079 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:36,079 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:36,079 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:36,079 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:36,079 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:36,079 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:36,079 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:36,079 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1======== [2021-06-16 16:33:36,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1395 states have (on average 3.1591397849462366) internal successors, (4407), 1402 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,250 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:36,250 INFO L301 ceAbstractionStarter]: Result for error location Process1 was SAFE (3/5) [2021-06-16 16:33:36,251 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-16 16:33:36,251 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:36,252 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:36,252 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:36,252 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:36,252 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:36,252 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:36,252 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:36,252 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-16 16:33:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1395 states have (on average 3.1591397849462366) internal successors, (4407), 1402 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,406 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:36,406 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (4/5) [2021-06-16 16:33:36,406 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:36,407 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:36,407 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:36,407 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:36,407 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:36,407 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:36,407 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:36,407 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:36,408 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1Thread1of1ForFork1======== [2021-06-16 16:33:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1395 states have (on average 3.1591397849462366) internal successors, (4407), 1402 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-16 16:33:36,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:36,539 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:36,540 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash -559778971, now seen corresponding path program 1 times [2021-06-16 16:33:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:36,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43774514] [2021-06-16 16:33:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:36,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:36,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:36,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43774514] [2021-06-16 16:33:36,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43774514] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:36,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:36,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-16 16:33:36,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141658101] [2021-06-16 16:33:36,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:36,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:36,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:36,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,576 INFO L87 Difference]: Start difference. First operand has 1403 states, 1395 states have (on average 3.1591397849462366) internal successors, (4407), 1402 states have internal predecessors, (4407), 0 states have call successors, (0), 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, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:36,594 INFO L93 Difference]: Finished difference Result 398 states and 1203 transitions. [2021-06-16 16:33:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-06-16 16:33:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:36,597 INFO L225 Difference]: With dead ends: 398 [2021-06-16 16:33:36,597 INFO L226 Difference]: Without dead ends: 374 [2021-06-16 16:33:36,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-16 16:33:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 350. [2021-06-16 16:33:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 350 states have (on average 3.0742857142857143) internal successors, (1076), 349 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1076 transitions. [2021-06-16 16:33:36,607 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1076 transitions. Word has length 8 [2021-06-16 16:33:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:36,607 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1076 transitions. [2021-06-16 16:33:36,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1076 transitions. [2021-06-16 16:33:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:36,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:36,608 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:36,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-16 16:33:36,608 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash 419256713, now seen corresponding path program 1 times [2021-06-16 16:33:36,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:36,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061876623] [2021-06-16 16:33:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:36,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:36,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:36,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:36,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061876623] [2021-06-16 16:33:36,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061876623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:36,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:36,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:36,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974421734] [2021-06-16 16:33:36,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:36,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,621 INFO L87 Difference]: Start difference. First operand 350 states and 1076 transitions. 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) [2021-06-16 16:33:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:36,642 INFO L93 Difference]: Finished difference Result 560 states and 1676 transitions. [2021-06-16 16:33:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:36,642 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 [2021-06-16 16:33:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:36,645 INFO L225 Difference]: With dead ends: 560 [2021-06-16 16:33:36,645 INFO L226 Difference]: Without dead ends: 464 [2021-06-16 16:33:36,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-16 16:33:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 356. [2021-06-16 16:33:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 356 states have (on average 2.898876404494382) internal successors, (1032), 355 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1032 transitions. [2021-06-16 16:33:36,656 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1032 transitions. Word has length 12 [2021-06-16 16:33:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:36,656 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1032 transitions. [2021-06-16 16:33:36,656 INFO L483 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) [2021-06-16 16:33:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1032 transitions. [2021-06-16 16:33:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:36,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:36,657 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:36,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-16 16:33:36,657 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:36,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:36,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1014480893, now seen corresponding path program 2 times [2021-06-16 16:33:36,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:36,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38635336] [2021-06-16 16:33:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:36,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:36,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:36,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:36,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38635336] [2021-06-16 16:33:36,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38635336] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:36,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:36,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:36,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032856443] [2021-06-16 16:33:36,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:36,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,670 INFO L87 Difference]: Start difference. First operand 356 states and 1032 transitions. 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) [2021-06-16 16:33:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:36,686 INFO L93 Difference]: Finished difference Result 458 states and 1320 transitions. [2021-06-16 16:33:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:36,687 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 [2021-06-16 16:33:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:36,689 INFO L225 Difference]: With dead ends: 458 [2021-06-16 16:33:36,689 INFO L226 Difference]: Without dead ends: 458 [2021-06-16 16:33:36,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-16 16:33:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 412. [2021-06-16 16:33:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 412 states have (on average 2.8737864077669903) internal successors, (1184), 411 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1184 transitions. [2021-06-16 16:33:36,701 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1184 transitions. Word has length 12 [2021-06-16 16:33:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:36,701 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1184 transitions. [2021-06-16 16:33:36,701 INFO L483 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) [2021-06-16 16:33:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1184 transitions. [2021-06-16 16:33:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-16 16:33:36,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:36,702 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:36,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-16 16:33:36,702 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1957429318, now seen corresponding path program 1 times [2021-06-16 16:33:36,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:36,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775997763] [2021-06-16 16:33:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:36,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:36,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:36,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:36,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775997763] [2021-06-16 16:33:36,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775997763] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:36,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:36,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743966730] [2021-06-16 16:33:36,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:36,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,716 INFO L87 Difference]: Start difference. First operand 412 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:36,731 INFO L93 Difference]: Finished difference Result 484 states and 1390 transitions. [2021-06-16 16:33:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-16 16:33:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:36,734 INFO L225 Difference]: With dead ends: 484 [2021-06-16 16:33:36,734 INFO L226 Difference]: Without dead ends: 484 [2021-06-16 16:33:36,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-16 16:33:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 460. [2021-06-16 16:33:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 460 states have (on average 2.865217391304348) internal successors, (1318), 459 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1318 transitions. [2021-06-16 16:33:36,776 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1318 transitions. Word has length 19 [2021-06-16 16:33:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:36,776 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1318 transitions. [2021-06-16 16:33:36,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1318 transitions. [2021-06-16 16:33:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-16 16:33:36,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:36,777 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:36,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-16 16:33:36,778 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash -654209534, now seen corresponding path program 2 times [2021-06-16 16:33:36,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:36,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501422871] [2021-06-16 16:33:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:36,798 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:36,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:36,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:36,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501422871] [2021-06-16 16:33:36,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501422871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:36,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:36,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:33:36,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348990319] [2021-06-16 16:33:36,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:36,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:36,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:36,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,804 INFO L87 Difference]: Start difference. First operand 460 states and 1318 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:36,821 INFO L93 Difference]: Finished difference Result 490 states and 1383 transitions. [2021-06-16 16:33:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-16 16:33:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:36,823 INFO L225 Difference]: With dead ends: 490 [2021-06-16 16:33:36,823 INFO L226 Difference]: Without dead ends: 394 [2021-06-16 16:33:36,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-16 16:33:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 374. [2021-06-16 16:33:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 374 states have (on average 2.783422459893048) internal successors, (1041), 373 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1041 transitions. [2021-06-16 16:33:36,847 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1041 transitions. Word has length 19 [2021-06-16 16:33:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:36,847 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1041 transitions. [2021-06-16 16:33:36,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1041 transitions. [2021-06-16 16:33:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-16 16:33:36,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:36,848 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:36,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-16 16:33:36,849 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash 845734165, now seen corresponding path program 1 times [2021-06-16 16:33:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:36,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934774725] [2021-06-16 16:33:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:36,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,870 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:36,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:36,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:36,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:36,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934774725] [2021-06-16 16:33:36,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934774725] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:36,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:36,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:36,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608578359] [2021-06-16 16:33:36,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:36,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:36,882 INFO L87 Difference]: Start difference. First operand 374 states and 1041 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:36,911 INFO L93 Difference]: Finished difference Result 392 states and 1069 transitions. [2021-06-16 16:33:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-16 16:33:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:36,914 INFO L225 Difference]: With dead ends: 392 [2021-06-16 16:33:36,914 INFO L226 Difference]: Without dead ends: 392 [2021-06-16 16:33:36,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-16 16:33:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2021-06-16 16:33:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 392 states have (on average 2.7270408163265305) internal successors, (1069), 391 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1069 transitions. [2021-06-16 16:33:36,935 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1069 transitions. Word has length 26 [2021-06-16 16:33:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:36,936 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1069 transitions. [2021-06-16 16:33:36,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1069 transitions. [2021-06-16 16:33:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-16 16:33:36,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:36,937 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:36,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-16 16:33:36,938 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1735679934, now seen corresponding path program 1 times [2021-06-16 16:33:36,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:36,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618519200] [2021-06-16 16:33:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:36,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:36,966 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-16 16:33:36,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:36,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:36,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:36,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:36,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:36,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618519200] [2021-06-16 16:33:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618519200] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:36,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309132035] [2021-06-16 16:33:36,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:36,985 INFO L87 Difference]: Start difference. First operand 392 states and 1069 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:37,087 INFO L93 Difference]: Finished difference Result 462 states and 1221 transitions. [2021-06-16 16:33:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-06-16 16:33:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:37,089 INFO L225 Difference]: With dead ends: 462 [2021-06-16 16:33:37,089 INFO L226 Difference]: Without dead ends: 378 [2021-06-16 16:33:37,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-16 16:33:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-16 16:33:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-06-16 16:33:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 378 states have (on average 2.738095238095238) internal successors, (1035), 377 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1035 transitions. [2021-06-16 16:33:37,099 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1035 transitions. Word has length 27 [2021-06-16 16:33:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:37,099 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1035 transitions. [2021-06-16 16:33:37,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1035 transitions. [2021-06-16 16:33:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-16 16:33:37,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:37,100 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:37,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-16 16:33:37,100 INFO L430 AbstractCegarLoop]: === Iteration 8 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:37,100 INFO L82 PathProgramCache]: Analyzing trace with hash 545101270, now seen corresponding path program 2 times [2021-06-16 16:33:37,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:37,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694554785] [2021-06-16 16:33:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:37,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:37,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:37,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:37,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:37,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:37,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694554785] [2021-06-16 16:33:37,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694554785] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:37,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:37,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:37,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455252449] [2021-06-16 16:33:37,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:37,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:37,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:37,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:37,118 INFO L87 Difference]: Start difference. First operand 378 states and 1035 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:37,139 INFO L93 Difference]: Finished difference Result 397 states and 1068 transitions. [2021-06-16 16:33:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:37,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-06-16 16:33:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:37,141 INFO L225 Difference]: With dead ends: 397 [2021-06-16 16:33:37,142 INFO L226 Difference]: Without dead ends: 397 [2021-06-16 16:33:37,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-16 16:33:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2021-06-16 16:33:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 397 states have (on average 2.690176322418136) internal successors, (1068), 396 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1068 transitions. [2021-06-16 16:33:37,151 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1068 transitions. Word has length 27 [2021-06-16 16:33:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:37,152 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1068 transitions. [2021-06-16 16:33:37,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1068 transitions. [2021-06-16 16:33:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-16 16:33:37,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:37,152 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:37,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-16 16:33:37,153 INFO L430 AbstractCegarLoop]: === Iteration 9 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1588655511, now seen corresponding path program 3 times [2021-06-16 16:33:37,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:37,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346618520] [2021-06-16 16:33:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:37,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:37,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:37,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-16 16:33:37,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:37,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-16 16:33:37,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:37,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:37,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:37,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346618520] [2021-06-16 16:33:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346618520] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:37,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:37,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:37,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898331024] [2021-06-16 16:33:37,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:37,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:37,188 INFO L87 Difference]: Start difference. First operand 397 states and 1068 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:37,268 INFO L93 Difference]: Finished difference Result 239 states and 597 transitions. [2021-06-16 16:33:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:37,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-16 16:33:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:37,268 INFO L225 Difference]: With dead ends: 239 [2021-06-16 16:33:37,268 INFO L226 Difference]: Without dead ends: 0 [2021-06-16 16:33:37,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-16 16:33:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-16 16:33:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-16 16:33:37,269 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) [2021-06-16 16:33:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-16 16:33:37,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-16 16:33:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:37,269 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-16 16:33:37,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-16 16:33:37,270 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:37,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-16 16:33:37,270 INFO L301 ceAbstractionStarter]: Result for error location Process1Thread1of1ForFork1 was SAFE (5/5) [2021-06-16 16:33:37,270 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-16 16:33:37,272 INFO L202 PluginConnector]: Adding new model Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.06 04:33:37 BasicIcfg [2021-06-16 16:33:37,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-16 16:33:37,273 INFO L168 Benchmark]: Toolchain (without parser) took 3550.72 ms. Allocated memory was 176.2 MB in the beginning and 217.1 MB in the end (delta: 40.9 MB). Free memory was 154.6 MB in the beginning and 100.3 MB in the end (delta: 54.3 MB). Peak memory consumption was 96.3 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:37,273 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.59 ms. Allocated memory is still 176.2 MB. Free memory is still 155.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-16 16:33:37,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.36 ms. Allocated memory is still 176.2 MB. Free memory was 154.5 MB in the beginning and 153.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:37,274 INFO L168 Benchmark]: Boogie Preprocessor took 21.78 ms. Allocated memory is still 176.2 MB. Free memory was 153.1 MB in the beginning and 152.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:37,274 INFO L168 Benchmark]: RCFGBuilder took 232.89 ms. Allocated memory is still 176.2 MB. Free memory was 152.1 MB in the beginning and 139.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:37,274 INFO L168 Benchmark]: TraceAbstraction took 3263.21 ms. Allocated memory was 176.2 MB in the beginning and 217.1 MB in the end (delta: 40.9 MB). Free memory was 139.1 MB in the beginning and 100.3 MB in the end (delta: 38.8 MB). Peak memory consumption was 80.6 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:37,275 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 0.59 ms. Allocated memory is still 176.2 MB. Free memory is still 155.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.36 ms. Allocated memory is still 176.2 MB. Free memory was 154.5 MB in the beginning and 153.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.78 ms. Allocated memory is still 176.2 MB. Free memory was 153.1 MB in the beginning and 152.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 232.89 ms. Allocated memory is still 176.2 MB. Free memory was 152.1 MB in the beginning and 139.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3263.21 ms. Allocated memory was 176.2 MB in the beginning and 217.1 MB in the end (delta: 40.9 MB). Free memory was 139.1 MB in the beginning and 100.3 MB in the end (delta: 38.8 MB). Peak memory consumption was 80.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 7870, positive: 6392, positive conditional: 6392, positive unconditional: 0, negative: 1478, negative conditional: 1478, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 6675, positive: 6392, positive conditional: 0, positive unconditional: 6392, negative: 283, negative conditional: 0, negative unconditional: 283, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 511, positive: 485, positive conditional: 0, positive unconditional: 485, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 511, positive: 466, positive conditional: 0, positive unconditional: 466, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 95, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 57, negative conditional: 0, negative unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6675, positive: 5907, positive conditional: 0, positive unconditional: 5907, negative: 257, negative conditional: 0, negative unconditional: 257, unknown: 511, unknown conditional: 0, unknown unconditional: 511] , Statistics on independence cache: Total cache size (in pairs): 511, Positive cache size: 485, Positive conditional cache size: 0, Positive unconditional cache size: 485, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Independence queries for same thread: 1195 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 7870, positive: 6392, positive conditional: 6392, positive unconditional: 0, negative: 1478, negative conditional: 1478, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 6675, positive: 6392, positive conditional: 0, positive unconditional: 6392, negative: 283, negative conditional: 0, negative unconditional: 283, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 511, positive: 485, positive conditional: 0, positive unconditional: 485, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 511, positive: 466, positive conditional: 0, positive unconditional: 466, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 54, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6675, positive: 5907, positive conditional: 0, positive unconditional: 5907, negative: 257, negative conditional: 0, negative unconditional: 257, unknown: 511, unknown conditional: 0, unknown unconditional: 511] , Statistics on independence cache: Total cache size (in pairs): 511, Positive cache size: 485, Positive conditional cache size: 0, Positive unconditional cache size: 485, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Independence queries for same thread: 1195 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 7870, positive: 6392, positive conditional: 6392, positive unconditional: 0, negative: 1478, negative conditional: 1478, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 6675, positive: 6392, positive conditional: 0, positive unconditional: 6392, negative: 283, negative conditional: 0, negative unconditional: 283, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 511, positive: 485, positive conditional: 0, positive unconditional: 485, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 511, positive: 466, positive conditional: 0, positive unconditional: 466, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 49, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6675, positive: 5907, positive conditional: 0, positive unconditional: 5907, negative: 257, negative conditional: 0, negative unconditional: 257, unknown: 511, unknown conditional: 0, unknown unconditional: 511] , Statistics on independence cache: Total cache size (in pairs): 511, Positive cache size: 485, Positive conditional cache size: 0, Positive unconditional cache size: 485, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Independence queries for same thread: 1195 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 7870, positive: 6392, positive conditional: 6392, positive unconditional: 0, negative: 1478, negative conditional: 1478, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 6675, positive: 6392, positive conditional: 0, positive unconditional: 6392, negative: 283, negative conditional: 0, negative unconditional: 283, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 511, positive: 485, positive conditional: 0, positive unconditional: 485, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 511, positive: 466, positive conditional: 0, positive unconditional: 466, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 43, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6675, positive: 5907, positive conditional: 0, positive unconditional: 5907, negative: 257, negative conditional: 0, negative unconditional: 257, unknown: 511, unknown conditional: 0, unknown unconditional: 511] , Statistics on independence cache: Total cache size (in pairs): 511, Positive cache size: 485, Positive conditional cache size: 0, Positive unconditional cache size: 485, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Independence queries for same thread: 1195 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 7870, positive: 6392, positive conditional: 6392, positive unconditional: 0, negative: 1478, negative conditional: 1478, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 6675, positive: 6392, positive conditional: 0, positive unconditional: 6392, negative: 283, negative conditional: 0, negative unconditional: 283, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 511, positive: 485, positive conditional: 0, positive unconditional: 485, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 511, positive: 466, positive conditional: 0, positive unconditional: 466, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6675, positive: 5907, positive conditional: 0, positive unconditional: 5907, negative: 257, negative conditional: 0, negative unconditional: 257, unknown: 511, unknown conditional: 0, unknown unconditional: 511] , Statistics on independence cache: Total cache size (in pairs): 511, Positive cache size: 485, Positive conditional cache size: 0, Positive unconditional cache size: 485, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Independence queries for same thread: 1195 - PositiveResult [Line: 78]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 57]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process2Thread1of1ForFork2 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1745.3ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 34.4ms, AutomataDifference: 576.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 426.2ms, PartialOrderReductionTime: 400.4ms, HoareTripleCheckerStatistics: 395 SDtfs, 259 SDslu, 352 SDs, 0 SdLazy, 210 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 217.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 159.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 222 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.5ms SsaConstructionTime, 97.1ms SatisfiabilityAnalysisTime, 269.5ms InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 170 ConstructedInterpolants, 0 QuantifiedInterpolants, 430 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 1/1 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process2 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 186.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 9.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 176.9ms, PartialOrderReductionTime: 174.7ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 171.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 8.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 161.7ms, PartialOrderReductionTime: 158.3ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 154.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 10.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 143.0ms, PartialOrderReductionTime: 142.2ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1Thread1of1ForFork1 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 862.8ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 9.6ms, AutomataDifference: 354.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 127.0ms, PartialOrderReductionTime: 124.4ms, HoareTripleCheckerStatistics: 395 SDtfs, 264 SDslu, 352 SDs, 0 SdLazy, 210 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 141.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 133.1ms AutomataMinimizationTime, 9 MinimizatonAttempts, 222 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.7ms SsaConstructionTime, 22.4ms SatisfiabilityAnalysisTime, 162.6ms InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 419 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 1/1 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...