/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 17:09:23,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:09:23,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:09:23,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 17:09:23,860 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-Separate.epf [2021-06-05 17:09:23,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:09:23,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:09:23,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:09:23,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:09:23,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:09:23,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:09:23,893 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:09:23,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:09:23,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:09:23,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:09:23,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:09:23,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:09:23,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:09:23,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:09:23,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:09:23,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:09:23,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:09:23,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:09:23,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:09:23,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:09:23,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:09:23,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:09:23,896 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:09:23,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:09:23,898 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 17:09:23,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:09:24,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:09:24,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:09:24,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:09:24,204 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 17:09:24,207 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 17:09:24,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl [2021-06-05 17:09:24,208 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl' [2021-06-05 17:09:24,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:09:24,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 17:09:24,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:09:24,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:09:24,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:09:24,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:09:24,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:09:24,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:09:24,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:09:24,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/1) ... [2021-06-05 17:09:24,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:09:24,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:09:24,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:09:24,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:09:24,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (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 [2021-06-05 17:09:24,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 17:09:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 17:09:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 17:09:24,343 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 17:09:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 17:09:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 17:09:24,343 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 17:09:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:09:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:09:24,344 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 17:09:24,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:09:24,483 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 17:09:24,485 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:09:24 BoogieIcfgContainer [2021-06-05 17:09:24,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:09:24,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:09:24,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:09:24,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:09:24,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:24" (1/2) ... [2021-06-05 17:09:24,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a5bd62 and model type easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:09:24, skipping insertion in model container [2021-06-05 17:09:24,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:09:24" (2/2) ... [2021-06-05 17:09:24,491 INFO L111 eAbstractionObserver]: Analyzing ICFG easy11.wvr.bpl [2021-06-05 17:09:24,496 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:09:24,496 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:09:24,496 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:09:24,497 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:09:24,514 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,515 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,515 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,515 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,516 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,516 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,516 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,516 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,517 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,517 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,517 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,517 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,518 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,518 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,518 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,518 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,518 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,519 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,519 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,519 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,519 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,519 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,520 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,520 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,522 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,525 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:09:24,530 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 17:09:24,548 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 17:09:24,573 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:09:24,573 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:09:24,573 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:09:24,573 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:09:24,573 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:09:24,574 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:09:24,574 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:09:24,574 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 17:09:24,581 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 17:09:24,623 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:24,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:24,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:24,659 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1728152339, now seen corresponding path program 1 times [2021-06-05 17:09:24,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:24,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805798423] [2021-06-05 17:09:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:25,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:25,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805798423] [2021-06-05 17:09:25,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805798423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:25,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:25,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:25,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706709625] [2021-06-05 17:09:25,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:25,061 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 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 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:25,345 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-06-05 17:09:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:25,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:25,356 INFO L225 Difference]: With dead ends: 98 [2021-06-05 17:09:25,356 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 17:09:25,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 17:09:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-06-05 17:09:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-06-05 17:09:25,390 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 15 [2021-06-05 17:09:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:25,391 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-06-05 17:09:25,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-06-05 17:09:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:25,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:25,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:25,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:09:25,393 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2019667169, now seen corresponding path program 2 times [2021-06-05 17:09:25,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:25,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037240648] [2021-06-05 17:09:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:25,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:25,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037240648] [2021-06-05 17:09:25,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037240648] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:25,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:25,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:25,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334250705] [2021-06-05 17:09:25,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:25,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:25,492 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:25,692 INFO L93 Difference]: Finished difference Result 98 states and 190 transitions. [2021-06-05 17:09:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:25,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:25,697 INFO L225 Difference]: With dead ends: 98 [2021-06-05 17:09:25,697 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 17:09:25,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 17:09:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2021-06-05 17:09:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 127 transitions. [2021-06-05 17:09:25,717 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 127 transitions. Word has length 15 [2021-06-05 17:09:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:25,718 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 127 transitions. [2021-06-05 17:09:25,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 127 transitions. [2021-06-05 17:09:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:25,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:25,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:25,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:09:25,719 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash 949033841, now seen corresponding path program 3 times [2021-06-05 17:09:25,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:25,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439315298] [2021-06-05 17:09:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:25,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439315298] [2021-06-05 17:09:25,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439315298] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:25,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:25,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:25,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018170113] [2021-06-05 17:09:25,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:25,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:25,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:25,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:25,848 INFO L87 Difference]: Start difference. First operand 66 states and 127 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:25,990 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-06-05 17:09:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:25,992 INFO L225 Difference]: With dead ends: 89 [2021-06-05 17:09:25,992 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 17:09:25,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 17:09:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-06-05 17:09:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 128 transitions. [2021-06-05 17:09:25,998 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 128 transitions. Word has length 15 [2021-06-05 17:09:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:25,998 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 128 transitions. [2021-06-05 17:09:25,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 128 transitions. [2021-06-05 17:09:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:25,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:25,999 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:25,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 17:09:25,999 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:26,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1619078043, now seen corresponding path program 4 times [2021-06-05 17:09:26,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:26,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673266623] [2021-06-05 17:09:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:26,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:26,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673266623] [2021-06-05 17:09:26,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673266623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:26,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:26,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:26,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609400192] [2021-06-05 17:09:26,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:26,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:26,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:26,084 INFO L87 Difference]: Start difference. First operand 67 states and 128 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:26,254 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2021-06-05 17:09:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:26,256 INFO L225 Difference]: With dead ends: 88 [2021-06-05 17:09:26,256 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 17:09:26,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 17:09:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-06-05 17:09:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-06-05 17:09:26,270 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 15 [2021-06-05 17:09:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:26,270 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-06-05 17:09:26,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-06-05 17:09:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:26,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:26,271 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:26,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 17:09:26,272 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:26,272 INFO L82 PathProgramCache]: Analyzing trace with hash 168516007, now seen corresponding path program 5 times [2021-06-05 17:09:26,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:26,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940993977] [2021-06-05 17:09:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:26,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:26,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940993977] [2021-06-05 17:09:26,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940993977] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:26,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:26,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:26,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501787426] [2021-06-05 17:09:26,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:26,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:26,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:26,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:26,369 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:26,561 INFO L93 Difference]: Finished difference Result 106 states and 211 transitions. [2021-06-05 17:09:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:26,563 INFO L225 Difference]: With dead ends: 106 [2021-06-05 17:09:26,563 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 17:09:26,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 17:09:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-06-05 17:09:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 133 transitions. [2021-06-05 17:09:26,568 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 133 transitions. Word has length 15 [2021-06-05 17:09:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:26,569 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 133 transitions. [2021-06-05 17:09:26,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 133 transitions. [2021-06-05 17:09:26,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:26,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:26,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:26,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 17:09:26,570 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:26,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1157750279, now seen corresponding path program 6 times [2021-06-05 17:09:26,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:26,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784245033] [2021-06-05 17:09:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:26,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:26,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784245033] [2021-06-05 17:09:26,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784245033] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:26,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:26,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:26,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582106628] [2021-06-05 17:09:26,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:26,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:26,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:26,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:26,707 INFO L87 Difference]: Start difference. First operand 68 states and 133 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:26,887 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-05 17:09:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:26,888 INFO L225 Difference]: With dead ends: 98 [2021-06-05 17:09:26,888 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 17:09:26,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 17:09:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-06-05 17:09:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-05 17:09:26,893 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-06-05 17:09:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:26,893 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-05 17:09:26,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-05 17:09:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:26,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:26,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:26,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 17:09:26,894 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash -487706077, now seen corresponding path program 7 times [2021-06-05 17:09:26,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:26,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259704025] [2021-06-05 17:09:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:26,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259704025] [2021-06-05 17:09:26,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259704025] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:26,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:26,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:26,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615923591] [2021-06-05 17:09:26,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:26,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:26,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:26,985 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:27,147 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-06-05 17:09:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:27,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:27,148 INFO L225 Difference]: With dead ends: 97 [2021-06-05 17:09:27,148 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 17:09:27,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 17:09:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-06-05 17:09:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-05 17:09:27,152 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2021-06-05 17:09:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:27,152 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-05 17:09:27,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-05 17:09:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:27,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:27,153 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:27,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 17:09:27,153 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:27,154 INFO L82 PathProgramCache]: Analyzing trace with hash -82039123, now seen corresponding path program 8 times [2021-06-05 17:09:27,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:27,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123859405] [2021-06-05 17:09:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:27,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:27,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123859405] [2021-06-05 17:09:27,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123859405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:27,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:27,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:27,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95357895] [2021-06-05 17:09:27,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:27,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:27,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:27,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:27,236 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:27,390 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-06-05 17:09:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:27,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:27,391 INFO L225 Difference]: With dead ends: 95 [2021-06-05 17:09:27,391 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 17:09:27,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 17:09:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-06-05 17:09:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-05 17:09:27,395 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-06-05 17:09:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:27,395 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-05 17:09:27,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-05 17:09:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:27,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:27,396 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:27,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 17:09:27,396 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 588005079, now seen corresponding path program 9 times [2021-06-05 17:09:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886520285] [2021-06-05 17:09:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:27,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:27,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886520285] [2021-06-05 17:09:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886520285] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:27,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:27,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:27,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146342197] [2021-06-05 17:09:27,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:27,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:27,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:27,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:27,470 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:27,632 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-06-05 17:09:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:27,633 INFO L225 Difference]: With dead ends: 94 [2021-06-05 17:09:27,634 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 17:09:27,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 17:09:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-06-05 17:09:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-06-05 17:09:27,637 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 15 [2021-06-05 17:09:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:27,642 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-06-05 17:09:27,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-06-05 17:09:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:27,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:27,643 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:27,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 17:09:27,643 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2044309529, now seen corresponding path program 10 times [2021-06-05 17:09:27,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:27,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408201942] [2021-06-05 17:09:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:27,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:27,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408201942] [2021-06-05 17:09:27,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408201942] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:27,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:27,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:27,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977622335] [2021-06-05 17:09:27,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:27,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:27,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:27,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:27,736 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:27,874 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-06-05 17:09:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:27,875 INFO L225 Difference]: With dead ends: 97 [2021-06-05 17:09:27,875 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 17:09:27,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 17:09:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-06-05 17:09:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 69 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 135 transitions. [2021-06-05 17:09:27,878 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 135 transitions. Word has length 15 [2021-06-05 17:09:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:27,878 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 135 transitions. [2021-06-05 17:09:27,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 135 transitions. [2021-06-05 17:09:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:27,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:27,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:27,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 17:09:27,879 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:27,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1160181413, now seen corresponding path program 11 times [2021-06-05 17:09:27,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:27,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416739259] [2021-06-05 17:09:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:27,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416739259] [2021-06-05 17:09:27,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416739259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:27,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:27,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:27,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413208443] [2021-06-05 17:09:27,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:27,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:27,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:27,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:27,960 INFO L87 Difference]: Start difference. First operand 70 states and 135 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:28,109 INFO L93 Difference]: Finished difference Result 110 states and 221 transitions. [2021-06-05 17:09:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:28,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:28,110 INFO L225 Difference]: With dead ends: 110 [2021-06-05 17:09:28,110 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 17:09:28,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 17:09:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-06-05 17:09:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 17:09:28,113 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 15 [2021-06-05 17:09:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:28,113 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 17:09:28,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 17:09:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:28,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:28,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:28,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 17:09:28,114 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1808519597, now seen corresponding path program 12 times [2021-06-05 17:09:28,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:28,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303601480] [2021-06-05 17:09:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:28,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:28,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303601480] [2021-06-05 17:09:28,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303601480] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:28,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:28,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:28,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049591217] [2021-06-05 17:09:28,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:28,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:28,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:28,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:28,184 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:28,345 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-06-05 17:09:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:28,347 INFO L225 Difference]: With dead ends: 102 [2021-06-05 17:09:28,350 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 17:09:28,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 17:09:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-06-05 17:09:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-06-05 17:09:28,357 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-06-05 17:09:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:28,358 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-06-05 17:09:28,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-06-05 17:09:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:28,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:28,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:28,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 17:09:28,359 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1816403497, now seen corresponding path program 13 times [2021-06-05 17:09:28,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:28,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061418193] [2021-06-05 17:09:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:28,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:28,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061418193] [2021-06-05 17:09:28,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061418193] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:28,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:28,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:28,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899683386] [2021-06-05 17:09:28,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:28,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:28,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:28,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:28,445 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:28,591 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-06-05 17:09:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:28,593 INFO L225 Difference]: With dead ends: 101 [2021-06-05 17:09:28,593 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 17:09:28,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 17:09:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-06-05 17:09:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-05 17:09:28,597 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 15 [2021-06-05 17:09:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:28,597 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-05 17:09:28,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-05 17:09:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:28,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:28,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:28,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 17:09:28,598 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1410736543, now seen corresponding path program 14 times [2021-06-05 17:09:28,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:28,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671425659] [2021-06-05 17:09:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:28,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:28,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671425659] [2021-06-05 17:09:28,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671425659] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:28,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:28,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:28,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559841338] [2021-06-05 17:09:28,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:28,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:28,689 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:28,840 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-05 17:09:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:28,840 INFO L225 Difference]: With dead ends: 104 [2021-06-05 17:09:28,840 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 17:09:28,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 17:09:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-06-05 17:09:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-06-05 17:09:28,843 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-06-05 17:09:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:28,844 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-06-05 17:09:28,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-06-05 17:09:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:28,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:28,844 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:28,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 17:09:28,844 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash -740692341, now seen corresponding path program 15 times [2021-06-05 17:09:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:28,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254692449] [2021-06-05 17:09:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:28,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:28,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254692449] [2021-06-05 17:09:28,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254692449] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:28,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583452782] [2021-06-05 17:09:28,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:28,912 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:29,061 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-06-05 17:09:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:29,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:29,063 INFO L225 Difference]: With dead ends: 103 [2021-06-05 17:09:29,063 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 17:09:29,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 17:09:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-06-05 17:09:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 144 transitions. [2021-06-05 17:09:29,065 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 144 transitions. Word has length 15 [2021-06-05 17:09:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:29,066 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 144 transitions. [2021-06-05 17:09:29,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,066 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 144 transitions. [2021-06-05 17:09:29,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:29,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:29,066 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:29,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 17:09:29,067 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:29,067 INFO L82 PathProgramCache]: Analyzing trace with hash 921960347, now seen corresponding path program 16 times [2021-06-05 17:09:29,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:29,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681488664] [2021-06-05 17:09:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:29,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681488664] [2021-06-05 17:09:29,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681488664] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:29,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:29,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:29,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418426311] [2021-06-05 17:09:29,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:29,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:29,150 INFO L87 Difference]: Start difference. First operand 73 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:29,303 INFO L93 Difference]: Finished difference Result 106 states and 212 transitions. [2021-06-05 17:09:29,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:29,306 INFO L225 Difference]: With dead ends: 106 [2021-06-05 17:09:29,306 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 17:09:29,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 17:09:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2021-06-05 17:09:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-06-05 17:09:29,310 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 15 [2021-06-05 17:09:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:29,310 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-06-05 17:09:29,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,311 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-06-05 17:09:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:29,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:29,311 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:29,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 17:09:29,311 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1329337487, now seen corresponding path program 17 times [2021-06-05 17:09:29,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:29,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391330133] [2021-06-05 17:09:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:29,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:29,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391330133] [2021-06-05 17:09:29,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391330133] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:29,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:29,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:29,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989159262] [2021-06-05 17:09:29,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:29,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:29,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:29,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:29,393 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:29,535 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-06-05 17:09:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:29,536 INFO L225 Difference]: With dead ends: 95 [2021-06-05 17:09:29,536 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 17:09:29,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 17:09:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2021-06-05 17:09:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-06-05 17:09:29,539 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 15 [2021-06-05 17:09:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:29,539 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-06-05 17:09:29,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-06-05 17:09:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:29,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:29,540 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:29,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 17:09:29,540 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash -659293285, now seen corresponding path program 18 times [2021-06-05 17:09:29,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:29,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478936788] [2021-06-05 17:09:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:29,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478936788] [2021-06-05 17:09:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478936788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:29,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:29,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189409113] [2021-06-05 17:09:29,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:29,611 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:29,763 INFO L93 Difference]: Finished difference Result 94 states and 183 transitions. [2021-06-05 17:09:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:29,765 INFO L225 Difference]: With dead ends: 94 [2021-06-05 17:09:29,765 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 17:09:29,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 17:09:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-06-05 17:09:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-06-05 17:09:29,769 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 15 [2021-06-05 17:09:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:29,769 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-06-05 17:09:29,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-06-05 17:09:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:29,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:29,770 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:29,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 17:09:29,771 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359403, now seen corresponding path program 19 times [2021-06-05 17:09:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:29,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323267657] [2021-06-05 17:09:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:29,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:29,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323267657] [2021-06-05 17:09:29,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323267657] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:29,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:29,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:29,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124755897] [2021-06-05 17:09:29,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:29,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:29,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:29,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:29,859 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:29,989 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-06-05 17:09:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:29,990 INFO L225 Difference]: With dead ends: 97 [2021-06-05 17:09:29,990 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 17:09:29,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 17:09:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-06-05 17:09:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.971830985915493) internal successors, (140), 71 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 140 transitions. [2021-06-05 17:09:29,993 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 140 transitions. Word has length 15 [2021-06-05 17:09:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:29,993 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 140 transitions. [2021-06-05 17:09:29,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 140 transitions. [2021-06-05 17:09:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:09:29,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:29,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:29,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 17:09:29,994 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash -67100201, now seen corresponding path program 20 times [2021-06-05 17:09:29,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:29,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908899733] [2021-06-05 17:09:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:30,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908899733] [2021-06-05 17:09:30,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908899733] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:30,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:30,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:09:30,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160458414] [2021-06-05 17:09:30,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:09:30,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:30,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:09:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:30,056 INFO L87 Difference]: Start difference. First operand 72 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:30,178 INFO L93 Difference]: Finished difference Result 103 states and 199 transitions. [2021-06-05 17:09:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:09:30,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 17:09:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:30,179 INFO L225 Difference]: With dead ends: 103 [2021-06-05 17:09:30,179 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 17:09:30,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 17:09:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-06-05 17:09:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 143 transitions. [2021-06-05 17:09:30,182 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 143 transitions. Word has length 15 [2021-06-05 17:09:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:30,182 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 143 transitions. [2021-06-05 17:09:30,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 143 transitions. [2021-06-05 17:09:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:30,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:30,183 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:30,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 17:09:30,183 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash -55242805, now seen corresponding path program 1 times [2021-06-05 17:09:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:30,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379682767] [2021-06-05 17:09:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:30,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379682767] [2021-06-05 17:09:30,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379682767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:30,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059818785] [2021-06-05 17:09:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 17:09:30,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059818785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:30,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:30,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:09:30,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140007202] [2021-06-05 17:09:30,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:30,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:30,289 INFO L87 Difference]: Start difference. First operand 74 states and 143 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:30,352 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-06-05 17:09:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:09:30,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:30,353 INFO L225 Difference]: With dead ends: 108 [2021-06-05 17:09:30,353 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 17:09:30,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 17:09:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2021-06-05 17:09:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-06-05 17:09:30,356 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 17 [2021-06-05 17:09:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:30,356 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-06-05 17:09:30,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-06-05 17:09:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:30,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:30,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:30,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 17:09:30,580 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:30,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1323979185, now seen corresponding path program 1 times [2021-06-05 17:09:30,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:30,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811504087] [2021-06-05 17:09:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:30,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811504087] [2021-06-05 17:09:30,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811504087] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:30,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:30,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:30,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014367297] [2021-06-05 17:09:30,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:30,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:30,620 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:30,689 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-06-05 17:09:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:09:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:30,690 INFO L225 Difference]: With dead ends: 120 [2021-06-05 17:09:30,690 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 17:09:30,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 17:09:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2021-06-05 17:09:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-05 17:09:30,697 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 17 [2021-06-05 17:09:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:30,697 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-05 17:09:30,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-05 17:09:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:30,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:30,698 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:30,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 17:09:30,699 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1212131849, now seen corresponding path program 2 times [2021-06-05 17:09:30,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:30,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632068699] [2021-06-05 17:09:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:30,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632068699] [2021-06-05 17:09:30,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632068699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:30,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310902665] [2021-06-05 17:09:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:30,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:30,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 17:09:30,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310902665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:30,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:30,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:09:30,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836044514] [2021-06-05 17:09:30,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:30,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:30,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:30,816 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:30,880 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-06-05 17:09:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:09:30,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:30,881 INFO L225 Difference]: With dead ends: 116 [2021-06-05 17:09:30,881 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 17:09:30,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 17:09:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2021-06-05 17:09:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0) internal successors, (138), 69 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 138 transitions. [2021-06-05 17:09:30,884 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 138 transitions. Word has length 17 [2021-06-05 17:09:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:30,884 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 138 transitions. [2021-06-05 17:09:30,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 138 transitions. [2021-06-05 17:09:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:30,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:30,885 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 17:09:31,105 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 308167817, now seen corresponding path program 2 times [2021-06-05 17:09:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300281774] [2021-06-05 17:09:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300281774] [2021-06-05 17:09:31,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300281774] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:31,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:31,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:31,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594210667] [2021-06-05 17:09:31,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:31,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:31,129 INFO L87 Difference]: Start difference. First operand 70 states and 138 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:31,207 INFO L93 Difference]: Finished difference Result 153 states and 286 transitions. [2021-06-05 17:09:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:09:31,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:31,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:31,208 INFO L225 Difference]: With dead ends: 153 [2021-06-05 17:09:31,208 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 17:09:31,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 17:09:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 80. [2021-06-05 17:09:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-05 17:09:31,213 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 17 [2021-06-05 17:09:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:31,213 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-05 17:09:31,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-05 17:09:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:31,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:31,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 17:09:31,214 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1656584079, now seen corresponding path program 3 times [2021-06-05 17:09:31,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214295939] [2021-06-05 17:09:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214295939] [2021-06-05 17:09:31,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214295939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:31,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:31,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:31,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671026109] [2021-06-05 17:09:31,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:31,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:31,234 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:31,303 INFO L93 Difference]: Finished difference Result 126 states and 243 transitions. [2021-06-05 17:09:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:09:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:31,305 INFO L225 Difference]: With dead ends: 126 [2021-06-05 17:09:31,305 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 17:09:31,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 17:09:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-06-05 17:09:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-05 17:09:31,307 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-06-05 17:09:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:31,307 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-05 17:09:31,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-05 17:09:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:31,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:31,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 17:09:31,309 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2146658699, now seen corresponding path program 3 times [2021-06-05 17:09:31,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153895149] [2021-06-05 17:09:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153895149] [2021-06-05 17:09:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153895149] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:31,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:31,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851726674] [2021-06-05 17:09:31,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:31,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:31,332 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:31,388 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-06-05 17:09:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:09:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:31,389 INFO L225 Difference]: With dead ends: 86 [2021-06-05 17:09:31,389 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 17:09:31,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 17:09:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-06-05 17:09:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-06-05 17:09:31,395 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-06-05 17:09:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:31,395 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-06-05 17:09:31,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-06-05 17:09:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:31,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:31,396 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 17:09:31,396 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash -60801859, now seen corresponding path program 4 times [2021-06-05 17:09:31,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520785585] [2021-06-05 17:09:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520785585] [2021-06-05 17:09:31,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520785585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:31,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766532783] [2021-06-05 17:09:31,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:09:31,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:31,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 17:09:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766532783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:31,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:31,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:09:31,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065784658] [2021-06-05 17:09:31,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:31,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:31,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:31,483 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:31,551 INFO L93 Difference]: Finished difference Result 124 states and 233 transitions. [2021-06-05 17:09:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:09:31,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:31,552 INFO L225 Difference]: With dead ends: 124 [2021-06-05 17:09:31,552 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 17:09:31,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 17:09:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2021-06-05 17:09:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-06-05 17:09:31,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-06-05 17:09:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:31,555 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-06-05 17:09:31,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-06-05 17:09:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:31,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:31,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 17:09:31,777 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash -964765891, now seen corresponding path program 4 times [2021-06-05 17:09:31,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986553632] [2021-06-05 17:09:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986553632] [2021-06-05 17:09:31,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986553632] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:31,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:31,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:31,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416439390] [2021-06-05 17:09:31,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:31,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:31,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:31,802 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:31,861 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-06-05 17:09:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:09:31,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:31,862 INFO L225 Difference]: With dead ends: 113 [2021-06-05 17:09:31,862 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 17:09:31,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 17:09:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-05 17:09:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-06-05 17:09:31,865 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-06-05 17:09:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:31,865 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-06-05 17:09:31,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-06-05 17:09:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:31,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:31,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 17:09:31,866 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash 383650371, now seen corresponding path program 5 times [2021-06-05 17:09:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683344510] [2021-06-05 17:09:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683344510] [2021-06-05 17:09:31,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683344510] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:31,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:31,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:31,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844114096] [2021-06-05 17:09:31,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:31,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:31,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:31,888 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:31,955 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2021-06-05 17:09:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:09:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:31,956 INFO L225 Difference]: With dead ends: 114 [2021-06-05 17:09:31,956 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 17:09:31,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 17:09:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-06-05 17:09:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-06-05 17:09:31,960 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-06-05 17:09:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:31,960 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-06-05 17:09:31,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-06-05 17:09:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:31,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:31,961 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 17:09:31,961 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash 873724991, now seen corresponding path program 5 times [2021-06-05 17:09:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589506338] [2021-06-05 17:09:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589506338] [2021-06-05 17:09:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589506338] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:31,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:31,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:31,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840456680] [2021-06-05 17:09:31,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:31,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:31,982 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:32,059 INFO L93 Difference]: Finished difference Result 139 states and 260 transitions. [2021-06-05 17:09:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:09:32,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:32,060 INFO L225 Difference]: With dead ends: 139 [2021-06-05 17:09:32,060 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 17:09:32,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:09:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 17:09:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2021-06-05 17:09:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.975) internal successors, (158), 80 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 158 transitions. [2021-06-05 17:09:32,063 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 158 transitions. Word has length 17 [2021-06-05 17:09:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:32,063 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 158 transitions. [2021-06-05 17:09:32,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 158 transitions. [2021-06-05 17:09:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:32,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:32,064 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:32,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 17:09:32,064 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1721217585, now seen corresponding path program 6 times [2021-06-05 17:09:32,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:32,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737249396] [2021-06-05 17:09:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:32,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:32,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737249396] [2021-06-05 17:09:32,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737249396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:32,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:32,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:32,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668541829] [2021-06-05 17:09:32,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:32,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:32,088 INFO L87 Difference]: Start difference. First operand 81 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:32,141 INFO L93 Difference]: Finished difference Result 105 states and 195 transitions. [2021-06-05 17:09:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:09:32,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:32,142 INFO L225 Difference]: With dead ends: 105 [2021-06-05 17:09:32,142 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 17:09:32,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 17:09:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-06-05 17:09:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-06-05 17:09:32,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 17 [2021-06-05 17:09:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:32,145 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-06-05 17:09:32,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-06-05 17:09:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:09:32,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:32,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:32,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 17:09:32,145 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1788806479, now seen corresponding path program 6 times [2021-06-05 17:09:32,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:32,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160031770] [2021-06-05 17:09:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:32,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:32,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160031770] [2021-06-05 17:09:32,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160031770] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:32,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:09:32,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:09:32,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436341373] [2021-06-05 17:09:32,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:09:32,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:32,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:09:32,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:09:32,162 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:32,213 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-06-05 17:09:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:09:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:09:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:32,214 INFO L225 Difference]: With dead ends: 82 [2021-06-05 17:09:32,214 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 17:09:32,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:09:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 17:09:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-06-05 17:09:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 131 transitions. [2021-06-05 17:09:32,216 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 131 transitions. Word has length 17 [2021-06-05 17:09:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:32,216 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 131 transitions. [2021-06-05 17:09:32,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 131 transitions. [2021-06-05 17:09:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:32,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:32,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:32,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 17:09:32,217 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash 24314285, now seen corresponding path program 1 times [2021-06-05 17:09:32,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:32,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056042390] [2021-06-05 17:09:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:32,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:32,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056042390] [2021-06-05 17:09:32,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056042390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:32,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899775903] [2021-06-05 17:09:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:32,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899775903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:32,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:32,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:32,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695065335] [2021-06-05 17:09:32,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:32,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:32,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:32,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:32,580 INFO L87 Difference]: Start difference. First operand 68 states and 131 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:32,815 INFO L93 Difference]: Finished difference Result 87 states and 162 transitions. [2021-06-05 17:09:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:09:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:32,816 INFO L225 Difference]: With dead ends: 87 [2021-06-05 17:09:32,816 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 17:09:32,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:09:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 17:09:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-06-05 17:09:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2021-06-05 17:09:32,820 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 19 [2021-06-05 17:09:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:32,820 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2021-06-05 17:09:32,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2021-06-05 17:09:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:32,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:32,821 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:33,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:33,044 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash -640382641, now seen corresponding path program 2 times [2021-06-05 17:09:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:33,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897383920] [2021-06-05 17:09:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:33,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897383920] [2021-06-05 17:09:33,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897383920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264712697] [2021-06-05 17:09:33,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:33,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:33,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:33,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264712697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:33,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:33,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:33,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819277070] [2021-06-05 17:09:33,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:33,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:33,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:33,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:33,402 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:33,627 INFO L93 Difference]: Finished difference Result 78 states and 138 transitions. [2021-06-05 17:09:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:09:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:33,627 INFO L225 Difference]: With dead ends: 78 [2021-06-05 17:09:33,627 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 17:09:33,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:09:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 17:09:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-06-05 17:09:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 113 transitions. [2021-06-05 17:09:33,630 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 113 transitions. Word has length 19 [2021-06-05 17:09:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:33,630 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 113 transitions. [2021-06-05 17:09:33,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 113 transitions. [2021-06-05 17:09:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:33,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:33,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:33,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 17:09:33,845 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:33,845 INFO L82 PathProgramCache]: Analyzing trace with hash 111018267, now seen corresponding path program 3 times [2021-06-05 17:09:33,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:33,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006299686] [2021-06-05 17:09:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:33,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:33,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006299686] [2021-06-05 17:09:33,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006299686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:33,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563438300] [2021-06-05 17:09:33,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:33,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:09:33,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:34,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563438300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:34,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:34,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519513015] [2021-06-05 17:09:34,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:34,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:34,207 INFO L87 Difference]: Start difference. First operand 61 states and 113 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:34,400 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-06-05 17:09:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:09:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:34,401 INFO L225 Difference]: With dead ends: 80 [2021-06-05 17:09:34,401 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 17:09:34,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 17:09:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-06-05 17:09:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-06-05 17:09:34,403 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 19 [2021-06-05 17:09:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:34,403 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-06-05 17:09:34,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-06-05 17:09:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:34,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:34,404 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:34,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:34,605 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1215248019, now seen corresponding path program 4 times [2021-06-05 17:09:34,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:34,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657259314] [2021-06-05 17:09:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:34,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:34,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657259314] [2021-06-05 17:09:34,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657259314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:34,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420785154] [2021-06-05 17:09:34,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:34,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:34,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:09:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:34,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420785154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:34,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:34,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:34,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320140460] [2021-06-05 17:09:34,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:34,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:34,952 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:35,371 INFO L93 Difference]: Finished difference Result 109 states and 201 transitions. [2021-06-05 17:09:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:09:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:35,372 INFO L225 Difference]: With dead ends: 109 [2021-06-05 17:09:35,372 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 17:09:35,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:09:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 17:09:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-06-05 17:09:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 161 transitions. [2021-06-05 17:09:35,375 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 161 transitions. Word has length 19 [2021-06-05 17:09:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:35,375 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 161 transitions. [2021-06-05 17:09:35,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 161 transitions. [2021-06-05 17:09:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:35,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:35,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:35,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 17:09:35,585 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash -545203817, now seen corresponding path program 5 times [2021-06-05 17:09:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:35,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336541418] [2021-06-05 17:09:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:35,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:35,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336541418] [2021-06-05 17:09:35,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336541418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:35,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635767115] [2021-06-05 17:09:35,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:35,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:35,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:35,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:35,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635767115] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:35,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:09:35,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:09:35,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800886203] [2021-06-05 17:09:35,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:35,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:35,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:35,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:35,910 INFO L87 Difference]: Start difference. First operand 86 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:35,979 INFO L93 Difference]: Finished difference Result 96 states and 174 transitions. [2021-06-05 17:09:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:09:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:09:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:35,980 INFO L225 Difference]: With dead ends: 96 [2021-06-05 17:09:35,980 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 17:09:35,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 17:09:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-06-05 17:09:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 76 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 146 transitions. [2021-06-05 17:09:35,982 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 146 transitions. Word has length 19 [2021-06-05 17:09:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:35,982 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 146 transitions. [2021-06-05 17:09:35,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 146 transitions. [2021-06-05 17:09:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:35,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:35,983 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:36,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 17:09:36,197 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1290089747, now seen corresponding path program 6 times [2021-06-05 17:09:36,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:36,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807996716] [2021-06-05 17:09:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:36,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:36,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807996716] [2021-06-05 17:09:36,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807996716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:36,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073825893] [2021-06-05 17:09:36,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:36,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:09:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:36,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073825893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:36,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:36,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:36,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174649280] [2021-06-05 17:09:36,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:36,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:36,507 INFO L87 Difference]: Start difference. First operand 77 states and 146 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:36,823 INFO L93 Difference]: Finished difference Result 108 states and 202 transitions. [2021-06-05 17:09:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:09:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:36,823 INFO L225 Difference]: With dead ends: 108 [2021-06-05 17:09:36,823 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 17:09:36,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:09:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 17:09:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-05 17:09:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 82 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 158 transitions. [2021-06-05 17:09:36,826 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 158 transitions. Word has length 19 [2021-06-05 17:09:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:36,826 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 158 transitions. [2021-06-05 17:09:36,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2021-06-05 17:09:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:36,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:36,827 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:37,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 17:09:37,041 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:37,041 INFO L82 PathProgramCache]: Analyzing trace with hash -538688839, now seen corresponding path program 7 times [2021-06-05 17:09:37,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:37,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440280465] [2021-06-05 17:09:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:37,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:37,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440280465] [2021-06-05 17:09:37,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440280465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:37,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794950843] [2021-06-05 17:09:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:37,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794950843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:37,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:37,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:37,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648355887] [2021-06-05 17:09:37,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:37,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:37,366 INFO L87 Difference]: Start difference. First operand 83 states and 158 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:37,617 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-06-05 17:09:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:09:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:37,618 INFO L225 Difference]: With dead ends: 113 [2021-06-05 17:09:37,618 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 17:09:37,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 303.2ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:09:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 17:09:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-06-05 17:09:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 84 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 161 transitions. [2021-06-05 17:09:37,621 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 161 transitions. Word has length 19 [2021-06-05 17:09:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:37,621 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 161 transitions. [2021-06-05 17:09:37,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 161 transitions. [2021-06-05 17:09:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:37,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:37,622 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:37,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 17:09:37,841 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1864955125, now seen corresponding path program 8 times [2021-06-05 17:09:37,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:37,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475220446] [2021-06-05 17:09:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:37,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475220446] [2021-06-05 17:09:37,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475220446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324502115] [2021-06-05 17:09:37,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:37,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:37,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:37,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:38,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324502115] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:38,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:09:38,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:09:38,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497598127] [2021-06-05 17:09:38,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:38,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:38,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:38,139 INFO L87 Difference]: Start difference. First operand 85 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:38,244 INFO L93 Difference]: Finished difference Result 101 states and 183 transitions. [2021-06-05 17:09:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:09:38,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:09:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:38,245 INFO L225 Difference]: With dead ends: 101 [2021-06-05 17:09:38,245 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 17:09:38,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 17:09:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-06-05 17:09:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 159 transitions. [2021-06-05 17:09:38,247 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 159 transitions. Word has length 19 [2021-06-05 17:09:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:38,247 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 159 transitions. [2021-06-05 17:09:38,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 159 transitions. [2021-06-05 17:09:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:38,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:38,248 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:38,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 17:09:38,465 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1194910923, now seen corresponding path program 9 times [2021-06-05 17:09:38,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:38,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890193917] [2021-06-05 17:09:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:38,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:38,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890193917] [2021-06-05 17:09:38,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890193917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:38,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194493579] [2021-06-05 17:09:38,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:38,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:09:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:38,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194493579] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:38,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:09:38,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:09:38,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740854201] [2021-06-05 17:09:38,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:38,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:38,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:38,765 INFO L87 Difference]: Start difference. First operand 84 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:38,846 INFO L93 Difference]: Finished difference Result 93 states and 170 transitions. [2021-06-05 17:09:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:09:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:09:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:38,847 INFO L225 Difference]: With dead ends: 93 [2021-06-05 17:09:38,847 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 17:09:38,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 17:09:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-06-05 17:09:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.925) internal successors, (154), 80 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 154 transitions. [2021-06-05 17:09:38,849 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 154 transitions. Word has length 19 [2021-06-05 17:09:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:38,849 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 154 transitions. [2021-06-05 17:09:38,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:38,850 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 154 transitions. [2021-06-05 17:09:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:38,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:38,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:39,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:39,065 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1143148071, now seen corresponding path program 10 times [2021-06-05 17:09:39,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:39,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405095615] [2021-06-05 17:09:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:39,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:39,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405095615] [2021-06-05 17:09:39,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405095615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:39,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488732641] [2021-06-05 17:09:39,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:39,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:39,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:09:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:39,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488732641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:39,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:39,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:39,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499182401] [2021-06-05 17:09:39,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:39,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:39,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:39,334 INFO L87 Difference]: Start difference. First operand 81 states and 154 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:40,202 INFO L93 Difference]: Finished difference Result 176 states and 352 transitions. [2021-06-05 17:09:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:09:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:40,203 INFO L225 Difference]: With dead ends: 176 [2021-06-05 17:09:40,203 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 17:09:40,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 743.3ms TimeCoverageRelationStatistics Valid=566, Invalid=1984, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:09:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 17:09:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-06-05 17:09:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 218 transitions. [2021-06-05 17:09:40,206 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 218 transitions. Word has length 19 [2021-06-05 17:09:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:40,206 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 218 transitions. [2021-06-05 17:09:40,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 218 transitions. [2021-06-05 17:09:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:40,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:40,207 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:40,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 17:09:40,429 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:40,430 INFO L82 PathProgramCache]: Analyzing trace with hash 486925987, now seen corresponding path program 11 times [2021-06-05 17:09:40,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:40,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935057333] [2021-06-05 17:09:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:40,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935057333] [2021-06-05 17:09:40,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935057333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99819144] [2021-06-05 17:09:40,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:40,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:40,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99819144] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:09:40,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:09:40,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107522708] [2021-06-05 17:09:40,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:40,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:40,700 INFO L87 Difference]: Start difference. First operand 108 states and 218 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:40,848 INFO L93 Difference]: Finished difference Result 138 states and 273 transitions. [2021-06-05 17:09:40,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:09:40,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:09:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:40,849 INFO L225 Difference]: With dead ends: 138 [2021-06-05 17:09:40,849 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 17:09:40,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:09:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 17:09:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2021-06-05 17:09:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 17:09:40,853 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-05 17:09:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:40,853 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 17:09:40,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 17:09:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:40,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:40,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:41,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:41,054 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1562637143, now seen corresponding path program 12 times [2021-06-05 17:09:41,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:41,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470507578] [2021-06-05 17:09:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:41,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:41,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470507578] [2021-06-05 17:09:41,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470507578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:41,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516329560] [2021-06-05 17:09:41,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:09:41,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:09:41,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:41,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516329560] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:09:41,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:09:41,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:09:41,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163760455] [2021-06-05 17:09:41,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:41,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:41,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:41,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:41,362 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:41,505 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-05 17:09:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:09:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:09:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:41,506 INFO L225 Difference]: With dead ends: 128 [2021-06-05 17:09:41,506 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 17:09:41,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:09:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 17:09:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-06-05 17:09:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 17:09:41,509 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-05 17:09:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:41,509 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 17:09:41,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:09:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 17:09:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:41,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:41,510 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:41,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 17:09:41,736 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1069677465, now seen corresponding path program 13 times [2021-06-05 17:09:41,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:41,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197609818] [2021-06-05 17:09:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:41,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:41,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197609818] [2021-06-05 17:09:41,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197609818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:41,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079063544] [2021-06-05 17:09:41,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:42,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079063544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:42,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:42,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997700656] [2021-06-05 17:09:42,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:42,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:42,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:42,050 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:42,321 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-05 17:09:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:09:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:42,322 INFO L225 Difference]: With dead ends: 128 [2021-06-05 17:09:42,322 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 17:09:42,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:09:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 17:09:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-06-05 17:09:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 17:09:42,324 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-05 17:09:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:42,324 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 17:09:42,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 17:09:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:42,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:42,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:42,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:42,545 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1532453059, now seen corresponding path program 14 times [2021-06-05 17:09:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:42,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120962569] [2021-06-05 17:09:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:42,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:42,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120962569] [2021-06-05 17:09:42,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120962569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:42,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747561588] [2021-06-05 17:09:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:42,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:42,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:42,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:42,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747561588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:42,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:42,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:42,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170052403] [2021-06-05 17:09:42,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:42,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:42,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:42,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:42,887 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:43,344 INFO L93 Difference]: Finished difference Result 202 states and 422 transitions. [2021-06-05 17:09:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:09:43,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:43,345 INFO L225 Difference]: With dead ends: 202 [2021-06-05 17:09:43,345 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 17:09:43,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 472.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:09:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 17:09:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2021-06-05 17:09:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 17:09:43,348 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 17:09:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:43,349 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 17:09:43,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 17:09:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:43,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:43,349 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:43,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 17:09:43,569 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1450387207, now seen corresponding path program 15 times [2021-06-05 17:09:43,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:43,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719680392] [2021-06-05 17:09:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:43,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:43,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719680392] [2021-06-05 17:09:43,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719680392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:43,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775062709] [2021-06-05 17:09:43,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:43,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:09:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:43,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775062709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:43,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:43,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:43,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671649808] [2021-06-05 17:09:43,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:43,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:43,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:43,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:43,901 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:44,168 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-06-05 17:09:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:09:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:44,169 INFO L225 Difference]: With dead ends: 184 [2021-06-05 17:09:44,169 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 17:09:44,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:09:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 17:09:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2021-06-05 17:09:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1842105263157894) internal successors, (332), 152 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 332 transitions. [2021-06-05 17:09:44,172 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 332 transitions. Word has length 19 [2021-06-05 17:09:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:44,172 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 332 transitions. [2021-06-05 17:09:44,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 332 transitions. [2021-06-05 17:09:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:44,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:44,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:44,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 17:09:44,389 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1731743665, now seen corresponding path program 16 times [2021-06-05 17:09:44,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:44,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814602335] [2021-06-05 17:09:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:44,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:44,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814602335] [2021-06-05 17:09:44,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814602335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:44,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898497624] [2021-06-05 17:09:44,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:44,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:44,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:09:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:44,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898497624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:44,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:44,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:44,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534528449] [2021-06-05 17:09:44,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:44,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:44,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:44,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:44,677 INFO L87 Difference]: Start difference. First operand 153 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:45,254 INFO L93 Difference]: Finished difference Result 335 states and 734 transitions. [2021-06-05 17:09:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:09:45,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:45,255 INFO L225 Difference]: With dead ends: 335 [2021-06-05 17:09:45,255 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 17:09:45,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:09:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 17:09:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 224. [2021-06-05 17:09:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2600896860986546) internal successors, (504), 223 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 504 transitions. [2021-06-05 17:09:45,261 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 504 transitions. Word has length 19 [2021-06-05 17:09:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:45,261 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 504 transitions. [2021-06-05 17:09:45,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 504 transitions. [2021-06-05 17:09:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:45,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:45,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:45,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 17:09:45,481 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1036341529, now seen corresponding path program 17 times [2021-06-05 17:09:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:45,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057293012] [2021-06-05 17:09:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:45,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:45,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057293012] [2021-06-05 17:09:45,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057293012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:45,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040028065] [2021-06-05 17:09:45,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:45,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:45,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:45,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040028065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:45,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:45,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:45,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374765434] [2021-06-05 17:09:45,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:45,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:45,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:45,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:45,726 INFO L87 Difference]: Start difference. First operand 224 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:46,153 INFO L93 Difference]: Finished difference Result 349 states and 784 transitions. [2021-06-05 17:09:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:09:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:46,156 INFO L225 Difference]: With dead ends: 349 [2021-06-05 17:09:46,156 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 17:09:46,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:09:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 17:09:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 250. [2021-06-05 17:09:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3453815261044175) internal successors, (584), 249 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 584 transitions. [2021-06-05 17:09:46,162 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 584 transitions. Word has length 19 [2021-06-05 17:09:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:46,162 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 584 transitions. [2021-06-05 17:09:46,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 584 transitions. [2021-06-05 17:09:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:46,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:46,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:46,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 17:09:46,373 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash 881151661, now seen corresponding path program 18 times [2021-06-05 17:09:46,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:46,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653470809] [2021-06-05 17:09:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:46,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:46,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653470809] [2021-06-05 17:09:46,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653470809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:46,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652923917] [2021-06-05 17:09:46,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:46,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:09:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:46,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652923917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:46,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:46,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:46,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346813533] [2021-06-05 17:09:46,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:46,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:46,664 INFO L87 Difference]: Start difference. First operand 250 states and 584 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:46,861 INFO L93 Difference]: Finished difference Result 293 states and 661 transitions. [2021-06-05 17:09:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:09:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:46,863 INFO L225 Difference]: With dead ends: 293 [2021-06-05 17:09:46,863 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 17:09:46,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:09:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 17:09:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 250. [2021-06-05 17:09:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3373493975903616) internal successors, (582), 249 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 582 transitions. [2021-06-05 17:09:46,867 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 582 transitions. Word has length 19 [2021-06-05 17:09:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:46,867 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 582 transitions. [2021-06-05 17:09:46,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 582 transitions. [2021-06-05 17:09:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:46,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:46,868 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:47,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 17:09:47,077 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash 306286283, now seen corresponding path program 19 times [2021-06-05 17:09:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:47,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289415651] [2021-06-05 17:09:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:47,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:47,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289415651] [2021-06-05 17:09:47,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289415651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:47,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661271352] [2021-06-05 17:09:47,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:47,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:47,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:47,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661271352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:47,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:47,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:47,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523953326] [2021-06-05 17:09:47,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:47,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:47,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:47,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:47,378 INFO L87 Difference]: Start difference. First operand 250 states and 582 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:47,644 INFO L93 Difference]: Finished difference Result 290 states and 653 transitions. [2021-06-05 17:09:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:09:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:47,645 INFO L225 Difference]: With dead ends: 290 [2021-06-05 17:09:47,645 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 17:09:47,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:09:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 17:09:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 248. [2021-06-05 17:09:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3441295546558703) internal successors, (579), 247 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 579 transitions. [2021-06-05 17:09:47,649 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 579 transitions. Word has length 19 [2021-06-05 17:09:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:47,649 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 579 transitions. [2021-06-05 17:09:47,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 579 transitions. [2021-06-05 17:09:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:47,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:47,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:47,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:47,853 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash 976330485, now seen corresponding path program 20 times [2021-06-05 17:09:47,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:47,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067389851] [2021-06-05 17:09:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:47,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067389851] [2021-06-05 17:09:47,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067389851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899189820] [2021-06-05 17:09:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:47,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:47,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:47,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:48,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899189820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:48,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:48,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:48,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858743060] [2021-06-05 17:09:48,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:48,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:48,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:48,141 INFO L87 Difference]: Start difference. First operand 248 states and 579 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:48,370 INFO L93 Difference]: Finished difference Result 277 states and 632 transitions. [2021-06-05 17:09:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:09:48,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:48,371 INFO L225 Difference]: With dead ends: 277 [2021-06-05 17:09:48,372 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 17:09:48,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:09:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 17:09:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2021-06-05 17:09:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.341463414634146) internal successors, (576), 246 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 576 transitions. [2021-06-05 17:09:48,376 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 576 transitions. Word has length 19 [2021-06-05 17:09:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:48,376 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 576 transitions. [2021-06-05 17:09:48,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 576 transitions. [2021-06-05 17:09:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:48,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:48,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:48,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 17:09:48,599 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1636799901, now seen corresponding path program 21 times [2021-06-05 17:09:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:48,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410366877] [2021-06-05 17:09:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:48,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:48,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410366877] [2021-06-05 17:09:48,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410366877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:48,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146744429] [2021-06-05 17:09:48,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:48,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:09:48,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:48,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146744429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:48,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:48,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:48,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209304353] [2021-06-05 17:09:48,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:48,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:48,882 INFO L87 Difference]: Start difference. First operand 247 states and 576 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:49,262 INFO L93 Difference]: Finished difference Result 368 states and 842 transitions. [2021-06-05 17:09:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:09:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:49,263 INFO L225 Difference]: With dead ends: 368 [2021-06-05 17:09:49,263 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 17:09:49,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:09:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 17:09:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 249. [2021-06-05 17:09:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.350806451612903) internal successors, (583), 248 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 583 transitions. [2021-06-05 17:09:49,269 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 583 transitions. Word has length 19 [2021-06-05 17:09:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:49,269 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 583 transitions. [2021-06-05 17:09:49,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:49,269 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 583 transitions. [2021-06-05 17:09:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:49,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:49,270 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:49,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:49,477 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -561088745, now seen corresponding path program 22 times [2021-06-05 17:09:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201621343] [2021-06-05 17:09:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:49,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:49,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201621343] [2021-06-05 17:09:49,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201621343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:49,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726015643] [2021-06-05 17:09:49,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:49,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:49,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:09:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:49,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726015643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:49,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:49,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:49,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537226710] [2021-06-05 17:09:49,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:49,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:49,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:49,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:49,747 INFO L87 Difference]: Start difference. First operand 249 states and 583 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:50,341 INFO L93 Difference]: Finished difference Result 314 states and 713 transitions. [2021-06-05 17:09:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:09:50,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:50,342 INFO L225 Difference]: With dead ends: 314 [2021-06-05 17:09:50,342 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 17:09:50,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 576.5ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:09:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 17:09:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2021-06-05 17:09:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.342857142857143) internal successors, (574), 245 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 574 transitions. [2021-06-05 17:09:50,350 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 574 transitions. Word has length 19 [2021-06-05 17:09:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:50,350 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 574 transitions. [2021-06-05 17:09:50,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 574 transitions. [2021-06-05 17:09:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:50,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:50,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:50,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 17:09:50,573 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1101563943, now seen corresponding path program 23 times [2021-06-05 17:09:50,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:50,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47739062] [2021-06-05 17:09:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:50,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:50,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47739062] [2021-06-05 17:09:50,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47739062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:50,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410774200] [2021-06-05 17:09:50,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:09:50,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:50,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:50,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:50,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410774200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:50,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:50,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:50,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574040464] [2021-06-05 17:09:50,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:50,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:50,839 INFO L87 Difference]: Start difference. First operand 246 states and 574 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:51,255 INFO L93 Difference]: Finished difference Result 388 states and 906 transitions. [2021-06-05 17:09:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:09:51,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:51,256 INFO L225 Difference]: With dead ends: 388 [2021-06-05 17:09:51,256 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 17:09:51,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:09:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 17:09:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 256. [2021-06-05 17:09:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.392156862745098) internal successors, (610), 255 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 610 transitions. [2021-06-05 17:09:51,261 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 610 transitions. Word has length 19 [2021-06-05 17:09:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:51,261 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 610 transitions. [2021-06-05 17:09:51,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 610 transitions. [2021-06-05 17:09:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:51,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:51,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:51,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:51,483 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1247703337, now seen corresponding path program 24 times [2021-06-05 17:09:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:51,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481450387] [2021-06-05 17:09:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:51,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:51,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481450387] [2021-06-05 17:09:51,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481450387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:51,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360160832] [2021-06-05 17:09:51,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:51,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:09:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:51,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360160832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:51,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:51,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:51,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076991522] [2021-06-05 17:09:51,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:51,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:51,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:51,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:51,763 INFO L87 Difference]: Start difference. First operand 256 states and 610 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:52,025 INFO L93 Difference]: Finished difference Result 361 states and 831 transitions. [2021-06-05 17:09:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:09:52,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:52,026 INFO L225 Difference]: With dead ends: 361 [2021-06-05 17:09:52,026 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 17:09:52,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:09:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 17:09:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 291. [2021-06-05 17:09:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.406896551724138) internal successors, (698), 290 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 698 transitions. [2021-06-05 17:09:52,031 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 698 transitions. Word has length 19 [2021-06-05 17:09:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:52,031 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 698 transitions. [2021-06-05 17:09:52,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 698 transitions. [2021-06-05 17:09:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:52,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:52,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:52,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 17:09:52,249 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1394193749, now seen corresponding path program 25 times [2021-06-05 17:09:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:52,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740789274] [2021-06-05 17:09:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:52,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740789274] [2021-06-05 17:09:52,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740789274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026391701] [2021-06-05 17:09:52,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:09:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:52,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:52,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026391701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:52,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:52,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:52,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355579431] [2021-06-05 17:09:52,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:52,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:52,538 INFO L87 Difference]: Start difference. First operand 291 states and 698 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:52,955 INFO L93 Difference]: Finished difference Result 506 states and 1196 transitions. [2021-06-05 17:09:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:09:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:52,957 INFO L225 Difference]: With dead ends: 506 [2021-06-05 17:09:52,957 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 17:09:52,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:09:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 17:09:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 330. [2021-06-05 17:09:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3951367781155017) internal successors, (788), 329 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 788 transitions. [2021-06-05 17:09:52,963 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 788 transitions. Word has length 19 [2021-06-05 17:09:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:52,964 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 788 transitions. [2021-06-05 17:09:52,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 788 transitions. [2021-06-05 17:09:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:52,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:52,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:53,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:53,181 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash 687948011, now seen corresponding path program 26 times [2021-06-05 17:09:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:53,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141173061] [2021-06-05 17:09:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:53,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:53,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141173061] [2021-06-05 17:09:53,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141173061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:53,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461614907] [2021-06-05 17:09:53,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:53,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:53,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461614907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:53,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:53,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399723194] [2021-06-05 17:09:53,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:53,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:53,492 INFO L87 Difference]: Start difference. First operand 330 states and 788 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:53,913 INFO L93 Difference]: Finished difference Result 456 states and 1025 transitions. [2021-06-05 17:09:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:09:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:53,915 INFO L225 Difference]: With dead ends: 456 [2021-06-05 17:09:53,915 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 17:09:53,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:09:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 17:09:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 335. [2021-06-05 17:09:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.3652694610778444) internal successors, (790), 334 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 790 transitions. [2021-06-05 17:09:53,921 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 790 transitions. Word has length 19 [2021-06-05 17:09:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:53,922 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 790 transitions. [2021-06-05 17:09:53,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 790 transitions. [2021-06-05 17:09:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:53,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:53,923 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:54,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 17:09:54,137 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash -332621849, now seen corresponding path program 27 times [2021-06-05 17:09:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662208468] [2021-06-05 17:09:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:54,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:54,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662208468] [2021-06-05 17:09:54,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662208468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:54,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848181030] [2021-06-05 17:09:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:54,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:09:54,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:54,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:54,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:54,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848181030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:54,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:54,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435871471] [2021-06-05 17:09:54,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:54,409 INFO L87 Difference]: Start difference. First operand 335 states and 790 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:54,662 INFO L93 Difference]: Finished difference Result 389 states and 881 transitions. [2021-06-05 17:09:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:09:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:54,664 INFO L225 Difference]: With dead ends: 389 [2021-06-05 17:09:54,664 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 17:09:54,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:09:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 17:09:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-06-05 17:09:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.3717105263157894) internal successors, (721), 304 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 721 transitions. [2021-06-05 17:09:54,669 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 721 transitions. Word has length 19 [2021-06-05 17:09:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:54,670 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 721 transitions. [2021-06-05 17:09:54,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 721 transitions. [2021-06-05 17:09:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:54,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:54,671 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:54,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:54,885 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1873029991, now seen corresponding path program 28 times [2021-06-05 17:09:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619920215] [2021-06-05 17:09:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:54,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:54,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619920215] [2021-06-05 17:09:54,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619920215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:54,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475606363] [2021-06-05 17:09:54,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:55,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:55,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:55,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:55,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475606363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:55,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:55,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:55,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742740300] [2021-06-05 17:09:55,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:55,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:55,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:55,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:55,163 INFO L87 Difference]: Start difference. First operand 305 states and 721 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:55,418 INFO L93 Difference]: Finished difference Result 348 states and 785 transitions. [2021-06-05 17:09:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:09:55,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:55,419 INFO L225 Difference]: With dead ends: 348 [2021-06-05 17:09:55,420 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 17:09:55,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:09:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 17:09:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 301. [2021-06-05 17:09:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.36) internal successors, (708), 300 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 708 transitions. [2021-06-05 17:09:55,424 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 708 transitions. Word has length 19 [2021-06-05 17:09:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:55,425 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 708 transitions. [2021-06-05 17:09:55,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 708 transitions. [2021-06-05 17:09:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:55,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:55,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:55,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 17:09:55,629 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:55,629 INFO L82 PathProgramCache]: Analyzing trace with hash 264714809, now seen corresponding path program 29 times [2021-06-05 17:09:55,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:55,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834204832] [2021-06-05 17:09:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:55,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:55,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834204832] [2021-06-05 17:09:55,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834204832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:55,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953151908] [2021-06-05 17:09:55,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:55,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:55,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:09:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:55,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953151908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:55,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:55,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:09:55,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904525164] [2021-06-05 17:09:55,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:55,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:55,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:55,904 INFO L87 Difference]: Start difference. First operand 301 states and 708 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:56,302 INFO L93 Difference]: Finished difference Result 332 states and 757 transitions. [2021-06-05 17:09:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:09:56,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:56,304 INFO L225 Difference]: With dead ends: 332 [2021-06-05 17:09:56,304 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 17:09:56,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:09:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 17:09:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2021-06-05 17:09:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.3488372093023258) internal successors, (707), 301 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 707 transitions. [2021-06-05 17:09:56,309 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 707 transitions. Word has length 19 [2021-06-05 17:09:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:56,309 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 707 transitions. [2021-06-05 17:09:56,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 707 transitions. [2021-06-05 17:09:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:56,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:56,310 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:56,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 17:09:56,525 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1254323989, now seen corresponding path program 30 times [2021-06-05 17:09:56,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:56,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199366761] [2021-06-05 17:09:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:56,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:56,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199366761] [2021-06-05 17:09:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199366761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:56,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693865903] [2021-06-05 17:09:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:56,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:09:56,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:56,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693865903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:56,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:56,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:09:56,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448926504] [2021-06-05 17:09:56,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:09:56,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:56,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:09:56,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:09:56,762 INFO L87 Difference]: Start difference. First operand 302 states and 707 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:56,949 INFO L93 Difference]: Finished difference Result 335 states and 755 transitions. [2021-06-05 17:09:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:09:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:56,950 INFO L225 Difference]: With dead ends: 335 [2021-06-05 17:09:56,950 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 17:09:56,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 17:09:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2021-06-05 17:09:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.321070234113712) internal successors, (694), 299 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 694 transitions. [2021-06-05 17:09:56,954 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 694 transitions. Word has length 19 [2021-06-05 17:09:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:56,955 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 694 transitions. [2021-06-05 17:09:56,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 694 transitions. [2021-06-05 17:09:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:56,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:56,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:57,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:57,169 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1786837659, now seen corresponding path program 31 times [2021-06-05 17:09:57,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:57,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48954468] [2021-06-05 17:09:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:57,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:57,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48954468] [2021-06-05 17:09:57,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48954468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:57,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786985883] [2021-06-05 17:09:57,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:57,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786985883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:57,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:57,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174117312] [2021-06-05 17:09:57,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:57,436 INFO L87 Difference]: Start difference. First operand 300 states and 694 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:57,808 INFO L93 Difference]: Finished difference Result 452 states and 1035 transitions. [2021-06-05 17:09:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:09:57,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:57,809 INFO L225 Difference]: With dead ends: 452 [2021-06-05 17:09:57,809 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 17:09:57,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:09:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 17:09:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 342. [2021-06-05 17:09:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.3870967741935485) internal successors, (814), 341 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 814 transitions. [2021-06-05 17:09:57,814 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 814 transitions. Word has length 19 [2021-06-05 17:09:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:57,814 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 814 transitions. [2021-06-05 17:09:57,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 814 transitions. [2021-06-05 17:09:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:57,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:57,815 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:58,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 17:09:58,037 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1586221843, now seen corresponding path program 32 times [2021-06-05 17:09:58,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476720238] [2021-06-05 17:09:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:58,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476720238] [2021-06-05 17:09:58,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476720238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057733791] [2021-06-05 17:09:58,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:58,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057733791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:58,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:58,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:58,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352452399] [2021-06-05 17:09:58,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:58,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:58,335 INFO L87 Difference]: Start difference. First operand 342 states and 814 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:58,759 INFO L93 Difference]: Finished difference Result 461 states and 1071 transitions. [2021-06-05 17:09:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:09:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:58,760 INFO L225 Difference]: With dead ends: 461 [2021-06-05 17:09:58,760 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 17:09:58,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:09:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 17:09:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-06-05 17:09:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-06-05 17:09:58,766 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-06-05 17:09:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:58,766 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-06-05 17:09:58,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-06-05 17:09:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:58,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:58,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:58,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:58,989 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1657537633, now seen corresponding path program 33 times [2021-06-05 17:09:58,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:58,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793264592] [2021-06-05 17:09:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:59,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793264592] [2021-06-05 17:09:59,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793264592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936630106] [2021-06-05 17:09:59,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:59,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:09:59,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:59,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:59,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936630106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:59,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:59,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:09:59,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844962308] [2021-06-05 17:09:59,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:09:59,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:09:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:09:59,274 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:59,510 INFO L93 Difference]: Finished difference Result 411 states and 955 transitions. [2021-06-05 17:09:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:09:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:09:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:59,512 INFO L225 Difference]: With dead ends: 411 [2021-06-05 17:09:59,512 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 17:09:59,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:09:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 17:09:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 357. [2021-06-05 17:09:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.398876404494382) internal successors, (854), 356 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 854 transitions. [2021-06-05 17:09:59,516 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 854 transitions. Word has length 19 [2021-06-05 17:09:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:59,516 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 854 transitions. [2021-06-05 17:09:59,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 854 transitions. [2021-06-05 17:09:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:09:59,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:59,517 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:59,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 17:09:59,732 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1886028755, now seen corresponding path program 34 times [2021-06-05 17:09:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:59,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348423377] [2021-06-05 17:09:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:59,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:59,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348423377] [2021-06-05 17:09:59,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348423377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:59,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171810184] [2021-06-05 17:09:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:59,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:59,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:09:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:00,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171810184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:00,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:00,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:00,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159204638] [2021-06-05 17:10:00,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:00,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:00,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:00,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:00,016 INFO L87 Difference]: Start difference. First operand 357 states and 854 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:00,288 INFO L93 Difference]: Finished difference Result 410 states and 952 transitions. [2021-06-05 17:10:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:10:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:00,289 INFO L225 Difference]: With dead ends: 410 [2021-06-05 17:10:00,289 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 17:10:00,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:10:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 17:10:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 359. [2021-06-05 17:10:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.393854748603352) internal successors, (857), 358 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 857 transitions. [2021-06-05 17:10:00,293 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 857 transitions. Word has length 19 [2021-06-05 17:10:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:00,293 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 857 transitions. [2021-06-05 17:10:00,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 857 transitions. [2021-06-05 17:10:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:00,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:00,294 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:00,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 17:10:00,495 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1752716457, now seen corresponding path program 35 times [2021-06-05 17:10:00,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:00,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425929496] [2021-06-05 17:10:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:00,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425929496] [2021-06-05 17:10:00,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425929496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941076416] [2021-06-05 17:10:00,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:00,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:00,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:00,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941076416] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:00,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:10:00,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:10:00,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376999017] [2021-06-05 17:10:00,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:10:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:10:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:00,742 INFO L87 Difference]: Start difference. First operand 359 states and 857 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:10:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:00,806 INFO L93 Difference]: Finished difference Result 398 states and 924 transitions. [2021-06-05 17:10:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:10:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:00,808 INFO L225 Difference]: With dead ends: 398 [2021-06-05 17:10:00,808 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 17:10:00,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 17:10:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 354. [2021-06-05 17:10:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-06-05 17:10:00,814 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-06-05 17:10:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:00,814 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-06-05 17:10:00,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:10:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-06-05 17:10:00,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:00,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:00,815 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:01,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:01,029 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1532889265, now seen corresponding path program 36 times [2021-06-05 17:10:01,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:01,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465046892] [2021-06-05 17:10:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:01,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:01,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465046892] [2021-06-05 17:10:01,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465046892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:01,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374040143] [2021-06-05 17:10:01,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:01,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:10:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:01,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:10:01,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:01,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374040143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:01,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:01,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:10:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551444172] [2021-06-05 17:10:01,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:10:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:01,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:10:01,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:01,280 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:01,902 INFO L93 Difference]: Finished difference Result 601 states and 1374 transitions. [2021-06-05 17:10:01,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:10:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:01,904 INFO L225 Difference]: With dead ends: 601 [2021-06-05 17:10:01,904 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 17:10:01,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:10:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 17:10:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 398. [2021-06-05 17:10:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.4005037783375314) internal successors, (953), 397 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 953 transitions. [2021-06-05 17:10:01,909 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 953 transitions. Word has length 19 [2021-06-05 17:10:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:01,909 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 953 transitions. [2021-06-05 17:10:01,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 953 transitions. [2021-06-05 17:10:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:01,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:01,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:02,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 17:10:02,125 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash -471317365, now seen corresponding path program 37 times [2021-06-05 17:10:02,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:02,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429093127] [2021-06-05 17:10:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:02,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429093127] [2021-06-05 17:10:02,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429093127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510409096] [2021-06-05 17:10:02,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:02,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510409096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:02,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:02,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:02,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852381010] [2021-06-05 17:10:02,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:02,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:02,427 INFO L87 Difference]: Start difference. First operand 398 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:02,649 INFO L93 Difference]: Finished difference Result 435 states and 1013 transitions. [2021-06-05 17:10:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:10:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:02,652 INFO L225 Difference]: With dead ends: 435 [2021-06-05 17:10:02,652 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 17:10:02,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:10:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 17:10:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 398. [2021-06-05 17:10:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.395465994962217) internal successors, (951), 397 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 951 transitions. [2021-06-05 17:10:02,657 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 951 transitions. Word has length 19 [2021-06-05 17:10:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:02,657 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 951 transitions. [2021-06-05 17:10:02,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 951 transitions. [2021-06-05 17:10:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:02,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:02,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:02,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:02,873 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1274029861, now seen corresponding path program 38 times [2021-06-05 17:10:02,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:02,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018850104] [2021-06-05 17:10:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:02,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:02,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018850104] [2021-06-05 17:10:02,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018850104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:02,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953563667] [2021-06-05 17:10:02,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:02,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:03,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953563667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:03,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:03,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:03,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500772735] [2021-06-05 17:10:03,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:03,160 INFO L87 Difference]: Start difference. First operand 398 states and 951 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:03,545 INFO L93 Difference]: Finished difference Result 532 states and 1221 transitions. [2021-06-05 17:10:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:10:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:03,548 INFO L225 Difference]: With dead ends: 532 [2021-06-05 17:10:03,548 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 17:10:03,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:10:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 17:10:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-06-05 17:10:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.3914141414141414) internal successors, (947), 396 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 947 transitions. [2021-06-05 17:10:03,554 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 947 transitions. Word has length 19 [2021-06-05 17:10:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:03,554 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 947 transitions. [2021-06-05 17:10:03,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 947 transitions. [2021-06-05 17:10:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:03,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:03,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:03,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 17:10:03,769 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1464333983, now seen corresponding path program 39 times [2021-06-05 17:10:03,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:03,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350700537] [2021-06-05 17:10:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:03,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:03,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350700537] [2021-06-05 17:10:03,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350700537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:03,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67385196] [2021-06-05 17:10:03,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:03,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:04,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67385196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:04,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:04,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:04,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413725984] [2021-06-05 17:10:04,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:04,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:04,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:04,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:04,036 INFO L87 Difference]: Start difference. First operand 397 states and 947 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:04,477 INFO L93 Difference]: Finished difference Result 528 states and 1212 transitions. [2021-06-05 17:10:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:10:04,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:04,479 INFO L225 Difference]: With dead ends: 528 [2021-06-05 17:10:04,479 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 17:10:04,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:10:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 17:10:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-06-05 17:10:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.385) internal successors, (954), 400 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 954 transitions. [2021-06-05 17:10:04,484 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 954 transitions. Word has length 19 [2021-06-05 17:10:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:04,484 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 954 transitions. [2021-06-05 17:10:04,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 954 transitions. [2021-06-05 17:10:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:04,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:04,485 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:04,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:04,685 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash 389426617, now seen corresponding path program 40 times [2021-06-05 17:10:04,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:04,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486679115] [2021-06-05 17:10:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:04,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:04,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486679115] [2021-06-05 17:10:04,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486679115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:04,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172208830] [2021-06-05 17:10:04,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:04,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:04,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:10:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:04,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172208830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:04,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:04,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:10:04,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097126109] [2021-06-05 17:10:04,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:10:04,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:04,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:10:04,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:04,970 INFO L87 Difference]: Start difference. First operand 401 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:05,367 INFO L93 Difference]: Finished difference Result 457 states and 1041 transitions. [2021-06-05 17:10:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:10:05,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:05,369 INFO L225 Difference]: With dead ends: 457 [2021-06-05 17:10:05,370 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 17:10:05,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:10:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 17:10:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 402. [2021-06-05 17:10:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.374064837905237) internal successors, (952), 401 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 952 transitions. [2021-06-05 17:10:05,376 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 952 transitions. Word has length 19 [2021-06-05 17:10:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 952 transitions. [2021-06-05 17:10:05,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 952 transitions. [2021-06-05 17:10:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:05,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:05,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:05,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:05,593 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1430558513, now seen corresponding path program 41 times [2021-06-05 17:10:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:05,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253691842] [2021-06-05 17:10:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:05,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253691842] [2021-06-05 17:10:05,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253691842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:05,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758144356] [2021-06-05 17:10:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:10:05,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:05,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:05,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758144356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:05,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:05,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:10:05,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826887907] [2021-06-05 17:10:05,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:10:05,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:10:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:05,886 INFO L87 Difference]: Start difference. First operand 402 states and 952 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:06,140 INFO L93 Difference]: Finished difference Result 474 states and 1095 transitions. [2021-06-05 17:10:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:10:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:06,141 INFO L225 Difference]: With dead ends: 474 [2021-06-05 17:10:06,141 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 17:10:06,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:10:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 17:10:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 395. [2021-06-05 17:10:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.3756345177664975) internal successors, (936), 394 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 936 transitions. [2021-06-05 17:10:06,145 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 936 transitions. Word has length 19 [2021-06-05 17:10:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:06,145 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 936 transitions. [2021-06-05 17:10:06,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 936 transitions. [2021-06-05 17:10:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:06,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:06,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:06,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 17:10:06,346 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 11172077, now seen corresponding path program 42 times [2021-06-05 17:10:06,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:06,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565879732] [2021-06-05 17:10:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:06,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:06,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565879732] [2021-06-05 17:10:06,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565879732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:06,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771536972] [2021-06-05 17:10:06,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:06,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:10:06,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:06,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:06,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771536972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:06,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:06,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:06,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094885900] [2021-06-05 17:10:06,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:06,621 INFO L87 Difference]: Start difference. First operand 395 states and 936 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:06,867 INFO L93 Difference]: Finished difference Result 505 states and 1159 transitions. [2021-06-05 17:10:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:10:06,868 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:06,869 INFO L225 Difference]: With dead ends: 505 [2021-06-05 17:10:06,869 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 17:10:06,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:10:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 17:10:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 414. [2021-06-05 17:10:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.375302663438257) internal successors, (981), 413 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 981 transitions. [2021-06-05 17:10:06,875 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 981 transitions. Word has length 19 [2021-06-05 17:10:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:06,875 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 981 transitions. [2021-06-05 17:10:06,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 981 transitions. [2021-06-05 17:10:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:06,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:06,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:07,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:07,098 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash 735553785, now seen corresponding path program 43 times [2021-06-05 17:10:07,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:07,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430943620] [2021-06-05 17:10:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:07,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:07,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430943620] [2021-06-05 17:10:07,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430943620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:07,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045475789] [2021-06-05 17:10:07,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:07,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:07,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045475789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:07,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:07,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:07,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595199632] [2021-06-05 17:10:07,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:07,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:07,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:07,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:07,355 INFO L87 Difference]: Start difference. First operand 414 states and 981 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:07,565 INFO L93 Difference]: Finished difference Result 489 states and 1127 transitions. [2021-06-05 17:10:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:10:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:07,567 INFO L225 Difference]: With dead ends: 489 [2021-06-05 17:10:07,567 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 17:10:07,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:10:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 17:10:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 435. [2021-06-05 17:10:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.3755760368663594) internal successors, (1031), 434 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1031 transitions. [2021-06-05 17:10:07,572 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1031 transitions. Word has length 19 [2021-06-05 17:10:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:07,572 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1031 transitions. [2021-06-05 17:10:07,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1031 transitions. [2021-06-05 17:10:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:07,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:07,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:07,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 17:10:07,774 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash 589063373, now seen corresponding path program 44 times [2021-06-05 17:10:07,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:07,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791200155] [2021-06-05 17:10:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:07,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:07,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791200155] [2021-06-05 17:10:07,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791200155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:07,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214324097] [2021-06-05 17:10:07,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:07,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:08,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214324097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:08,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:08,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:08,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212139410] [2021-06-05 17:10:08,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:08,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:08,067 INFO L87 Difference]: Start difference. First operand 435 states and 1031 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:08,332 INFO L93 Difference]: Finished difference Result 623 states and 1481 transitions. [2021-06-05 17:10:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:10:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:08,334 INFO L225 Difference]: With dead ends: 623 [2021-06-05 17:10:08,334 INFO L226 Difference]: Without dead ends: 609 [2021-06-05 17:10:08,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:10:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-05 17:10:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 521. [2021-06-05 17:10:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.4288461538461537) internal successors, (1263), 520 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1263 transitions. [2021-06-05 17:10:08,340 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1263 transitions. Word has length 19 [2021-06-05 17:10:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:08,340 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1263 transitions. [2021-06-05 17:10:08,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1263 transitions. [2021-06-05 17:10:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:08,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:08,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:08,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:08,541 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash -737202913, now seen corresponding path program 45 times [2021-06-05 17:10:08,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:08,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710445425] [2021-06-05 17:10:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:08,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710445425] [2021-06-05 17:10:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710445425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605974126] [2021-06-05 17:10:08,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:10:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:08,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605974126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:08,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:08,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:08,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364183176] [2021-06-05 17:10:08,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:08,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:08,818 INFO L87 Difference]: Start difference. First operand 521 states and 1263 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:09,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:09,098 INFO L93 Difference]: Finished difference Result 570 states and 1340 transitions. [2021-06-05 17:10:09,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:10:09,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:09,100 INFO L225 Difference]: With dead ends: 570 [2021-06-05 17:10:09,100 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 17:10:09,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:10:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 17:10:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 480. [2021-06-05 17:10:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-06-05 17:10:09,105 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 19 [2021-06-05 17:10:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:09,105 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-06-05 17:10:09,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-06-05 17:10:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:09,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:09,106 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:09,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 17:10:09,306 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:09,306 INFO L82 PathProgramCache]: Analyzing trace with hash -67158711, now seen corresponding path program 46 times [2021-06-05 17:10:09,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:09,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836967376] [2021-06-05 17:10:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:09,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:09,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836967376] [2021-06-05 17:10:09,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836967376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:09,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800441781] [2021-06-05 17:10:09,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:09,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:09,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:09,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:10:09,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:09,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800441781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:09,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:09,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:10:09,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179360713] [2021-06-05 17:10:09,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:10:09,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:10:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:09,559 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:10,102 INFO L93 Difference]: Finished difference Result 737 states and 1672 transitions. [2021-06-05 17:10:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:10:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:10,105 INFO L225 Difference]: With dead ends: 737 [2021-06-05 17:10:10,105 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 17:10:10,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 17:10:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 17:10:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 533. [2021-06-05 17:10:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.3477443609022557) internal successors, (1249), 532 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1249 transitions. [2021-06-05 17:10:10,112 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1249 transitions. Word has length 19 [2021-06-05 17:10:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:10,112 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1249 transitions. [2021-06-05 17:10:10,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1249 transitions. [2021-06-05 17:10:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:10,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:10,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:10,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 17:10:10,314 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:10,314 INFO L82 PathProgramCache]: Analyzing trace with hash 338508243, now seen corresponding path program 47 times [2021-06-05 17:10:10,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:10,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549888647] [2021-06-05 17:10:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:10,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:10,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549888647] [2021-06-05 17:10:10,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549888647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:10,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163215019] [2021-06-05 17:10:10,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:10,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:10,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:10,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163215019] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:10,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:10:10,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:10:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076362247] [2021-06-05 17:10:10,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:10:10,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:10,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:10:10,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:10,575 INFO L87 Difference]: Start difference. First operand 533 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:10:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:10,701 INFO L93 Difference]: Finished difference Result 675 states and 1555 transitions. [2021-06-05 17:10:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:10:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:10:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:10,704 INFO L225 Difference]: With dead ends: 675 [2021-06-05 17:10:10,704 INFO L226 Difference]: Without dead ends: 660 [2021-06-05 17:10:10,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:10:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-05 17:10:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 390. [2021-06-05 17:10:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3059125964010283) internal successors, (897), 389 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 897 transitions. [2021-06-05 17:10:10,711 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 897 transitions. Word has length 19 [2021-06-05 17:10:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:10,711 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 897 transitions. [2021-06-05 17:10:10,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:10:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 897 transitions. [2021-06-05 17:10:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:10,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:10,712 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:10,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:10,917 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1596297767, now seen corresponding path program 48 times [2021-06-05 17:10:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:10,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920233899] [2021-06-05 17:10:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:10,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:10,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920233899] [2021-06-05 17:10:10,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920233899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:10,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83512329] [2021-06-05 17:10:10,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:11,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:10:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:11,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:11,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:11,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83512329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:11,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:11,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:11,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209655291] [2021-06-05 17:10:11,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:11,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:11,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:11,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:11,171 INFO L87 Difference]: Start difference. First operand 390 states and 897 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:11,851 INFO L93 Difference]: Finished difference Result 552 states and 1225 transitions. [2021-06-05 17:10:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:10:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:11,853 INFO L225 Difference]: With dead ends: 552 [2021-06-05 17:10:11,853 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 17:10:11,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 619.2ms TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:10:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 17:10:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 431. [2021-06-05 17:10:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3232558139534882) internal successors, (999), 430 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 999 transitions. [2021-06-05 17:10:11,860 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 999 transitions. Word has length 19 [2021-06-05 17:10:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:11,860 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 999 transitions. [2021-06-05 17:10:11,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 999 transitions. [2021-06-05 17:10:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:11,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:11,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:12,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 17:10:12,065 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1320337189, now seen corresponding path program 49 times [2021-06-05 17:10:12,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:12,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230490497] [2021-06-05 17:10:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:12,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230490497] [2021-06-05 17:10:12,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230490497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380806034] [2021-06-05 17:10:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:12,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380806034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:12,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:12,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:12,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314700650] [2021-06-05 17:10:12,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:12,309 INFO L87 Difference]: Start difference. First operand 431 states and 999 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:12,521 INFO L93 Difference]: Finished difference Result 490 states and 1117 transitions. [2021-06-05 17:10:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:10:12,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:12,523 INFO L225 Difference]: With dead ends: 490 [2021-06-05 17:10:12,523 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 17:10:12,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:10:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 17:10:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-06-05 17:10:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.278481012658228) internal successors, (900), 395 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 900 transitions. [2021-06-05 17:10:12,529 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 900 transitions. Word has length 19 [2021-06-05 17:10:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:12,529 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 900 transitions. [2021-06-05 17:10:12,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 900 transitions. [2021-06-05 17:10:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:12,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:12,530 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:12,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:12,749 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1648363821, now seen corresponding path program 50 times [2021-06-05 17:10:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:12,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879839750] [2021-06-05 17:10:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:12,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879839750] [2021-06-05 17:10:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879839750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407160172] [2021-06-05 17:10:12,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:12,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:12,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:12,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:12,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:13,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407160172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:13,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:13,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:13,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543363987] [2021-06-05 17:10:13,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:13,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:13,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:13,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:13,021 INFO L87 Difference]: Start difference. First operand 396 states and 900 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:13,268 INFO L93 Difference]: Finished difference Result 448 states and 1001 transitions. [2021-06-05 17:10:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:10:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:13,269 INFO L225 Difference]: With dead ends: 448 [2021-06-05 17:10:13,270 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 17:10:13,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:10:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 17:10:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-06-05 17:10:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.197986577181208) internal successors, (655), 298 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 655 transitions. [2021-06-05 17:10:13,274 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 655 transitions. Word has length 19 [2021-06-05 17:10:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:13,274 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 655 transitions. [2021-06-05 17:10:13,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 655 transitions. [2021-06-05 17:10:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:13,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:13,275 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:13,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:13,475 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1976559273, now seen corresponding path program 51 times [2021-06-05 17:10:13,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:13,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464294065] [2021-06-05 17:10:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:13,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:13,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464294065] [2021-06-05 17:10:13,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464294065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:13,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092322696] [2021-06-05 17:10:13,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:13,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:10:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:13,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092322696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:13,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:13,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:13,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004632804] [2021-06-05 17:10:13,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:13,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:13,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:13,727 INFO L87 Difference]: Start difference. First operand 299 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:13,968 INFO L93 Difference]: Finished difference Result 337 states and 722 transitions. [2021-06-05 17:10:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:10:13,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:13,969 INFO L225 Difference]: With dead ends: 337 [2021-06-05 17:10:13,969 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 17:10:13,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:10:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 17:10:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 297. [2021-06-05 17:10:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.195945945945946) internal successors, (650), 296 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 650 transitions. [2021-06-05 17:10:13,973 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 650 transitions. Word has length 19 [2021-06-05 17:10:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:13,973 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 650 transitions. [2021-06-05 17:10:13,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 650 transitions. [2021-06-05 17:10:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:13,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:13,974 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:14,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:14,175 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:14,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:14,175 INFO L82 PathProgramCache]: Analyzing trace with hash -900848117, now seen corresponding path program 52 times [2021-06-05 17:10:14,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:14,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991947177] [2021-06-05 17:10:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:14,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:14,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991947177] [2021-06-05 17:10:14,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991947177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:14,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105354913] [2021-06-05 17:10:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:14,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:14,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:14,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:10:14,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:14,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105354913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:14,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:14,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:10:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494648978] [2021-06-05 17:10:14,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:10:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:10:14,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:14,443 INFO L87 Difference]: Start difference. First operand 297 states and 650 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:15,338 INFO L93 Difference]: Finished difference Result 546 states and 1150 transitions. [2021-06-05 17:10:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:10:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:15,339 INFO L225 Difference]: With dead ends: 546 [2021-06-05 17:10:15,339 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 17:10:15,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 827.0ms TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:10:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 17:10:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 330. [2021-06-05 17:10:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2036474164133737) internal successors, (725), 329 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 725 transitions. [2021-06-05 17:10:15,343 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 725 transitions. Word has length 19 [2021-06-05 17:10:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:15,343 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 725 transitions. [2021-06-05 17:10:15,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 725 transitions. [2021-06-05 17:10:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:15,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:15,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:15,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:15,544 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash -258765289, now seen corresponding path program 53 times [2021-06-05 17:10:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:15,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651443146] [2021-06-05 17:10:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:15,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651443146] [2021-06-05 17:10:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651443146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114213896] [2021-06-05 17:10:15,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:15,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:15,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:15,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:15,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114213896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:15,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:15,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:15,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205623336] [2021-06-05 17:10:15,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:15,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:15,826 INFO L87 Difference]: Start difference. First operand 330 states and 725 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:16,036 INFO L93 Difference]: Finished difference Result 370 states and 790 transitions. [2021-06-05 17:10:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:10:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:16,036 INFO L225 Difference]: With dead ends: 370 [2021-06-05 17:10:16,036 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 17:10:16,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:10:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 17:10:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 301. [2021-06-05 17:10:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.183333333333333) internal successors, (655), 300 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 655 transitions. [2021-06-05 17:10:16,040 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 655 transitions. Word has length 19 [2021-06-05 17:10:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:16,040 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 655 transitions. [2021-06-05 17:10:16,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 655 transitions. [2021-06-05 17:10:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:16,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:16,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:16,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:16,241 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash -385810339, now seen corresponding path program 54 times [2021-06-05 17:10:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:16,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131661216] [2021-06-05 17:10:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:16,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:16,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131661216] [2021-06-05 17:10:16,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131661216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:16,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826294997] [2021-06-05 17:10:16,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:16,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:10:16,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:16,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826294997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:16,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:16,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40420629] [2021-06-05 17:10:16,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:16,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:16,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:16,516 INFO L87 Difference]: Start difference. First operand 301 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:16,766 INFO L93 Difference]: Finished difference Result 354 states and 743 transitions. [2021-06-05 17:10:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:10:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:16,767 INFO L225 Difference]: With dead ends: 354 [2021-06-05 17:10:16,767 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 17:10:16,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:10:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 17:10:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 297. [2021-06-05 17:10:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.1824324324324325) internal successors, (646), 296 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 646 transitions. [2021-06-05 17:10:16,770 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 646 transitions. Word has length 19 [2021-06-05 17:10:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:16,770 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 646 transitions. [2021-06-05 17:10:16,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 646 transitions. [2021-06-05 17:10:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:16,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:16,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:16,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:16,972 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash 529271149, now seen corresponding path program 55 times [2021-06-05 17:10:16,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:16,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32933291] [2021-06-05 17:10:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:17,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32933291] [2021-06-05 17:10:17,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32933291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393603885] [2021-06-05 17:10:17,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393603885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:17,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:17,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372848900] [2021-06-05 17:10:17,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:17,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:17,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:17,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:17,228 INFO L87 Difference]: Start difference. First operand 297 states and 646 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:17,406 INFO L93 Difference]: Finished difference Result 323 states and 685 transitions. [2021-06-05 17:10:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:10:17,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:17,407 INFO L225 Difference]: With dead ends: 323 [2021-06-05 17:10:17,407 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 17:10:17,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:10:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 17:10:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 275. [2021-06-05 17:10:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1824817518248176) internal successors, (598), 274 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 598 transitions. [2021-06-05 17:10:17,410 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 598 transitions. Word has length 19 [2021-06-05 17:10:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:17,410 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 598 transitions. [2021-06-05 17:10:17,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 598 transitions. [2021-06-05 17:10:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:17,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:17,411 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:17,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 17:10:17,611 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1199315351, now seen corresponding path program 56 times [2021-06-05 17:10:17,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:17,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454345790] [2021-06-05 17:10:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454345790] [2021-06-05 17:10:17,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454345790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831756756] [2021-06-05 17:10:17,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:17,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:17,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831756756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:17,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:17,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58393580] [2021-06-05 17:10:17,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:17,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:17,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:17,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:17,929 INFO L87 Difference]: Start difference. First operand 275 states and 598 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:18,103 INFO L93 Difference]: Finished difference Result 299 states and 633 transitions. [2021-06-05 17:10:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:10:18,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:18,104 INFO L225 Difference]: With dead ends: 299 [2021-06-05 17:10:18,104 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 17:10:18,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:10:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 17:10:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 261. [2021-06-05 17:10:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.1846153846153844) internal successors, (568), 260 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 568 transitions. [2021-06-05 17:10:18,107 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 568 transitions. Word has length 19 [2021-06-05 17:10:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:18,107 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 568 transitions. [2021-06-05 17:10:18,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 568 transitions. [2021-06-05 17:10:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:18,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:18,108 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:18,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:18,308 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1432999257, now seen corresponding path program 57 times [2021-06-05 17:10:18,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:18,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806646985] [2021-06-05 17:10:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:18,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:18,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806646985] [2021-06-05 17:10:18,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806646985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946264643] [2021-06-05 17:10:18,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:18,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:18,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:18,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:18,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946264643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:18,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:10:18,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60789285] [2021-06-05 17:10:18,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:10:18,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:10:18,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:10:18,575 INFO L87 Difference]: Start difference. First operand 261 states and 568 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:18,743 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-06-05 17:10:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:10:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:18,744 INFO L225 Difference]: With dead ends: 282 [2021-06-05 17:10:18,744 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 17:10:18,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 17:10:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-06-05 17:10:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-06-05 17:10:18,747 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-06-05 17:10:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:18,747 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-06-05 17:10:18,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-06-05 17:10:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:18,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:18,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:18,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 17:10:18,948 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:18,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:18,948 INFO L82 PathProgramCache]: Analyzing trace with hash -265385941, now seen corresponding path program 58 times [2021-06-05 17:10:18,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:18,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978792655] [2021-06-05 17:10:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:19,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978792655] [2021-06-05 17:10:19,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978792655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195579925] [2021-06-05 17:10:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:19,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:19,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:10:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:19,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195579925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:19,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:19,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:10:19,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143152458] [2021-06-05 17:10:19,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:10:19,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:19,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:10:19,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:19,248 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:19,653 INFO L93 Difference]: Finished difference Result 319 states and 675 transitions. [2021-06-05 17:10:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:10:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:10:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:19,654 INFO L225 Difference]: With dead ends: 319 [2021-06-05 17:10:19,654 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 17:10:19,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:10:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 17:10:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-06-05 17:10:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-06-05 17:10:19,657 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-06-05 17:10:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:19,657 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-06-05 17:10:19,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-06-05 17:10:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:19,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:19,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:19,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:19,861 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1815085655, now seen corresponding path program 59 times [2021-06-05 17:10:19,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:19,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530982651] [2021-06-05 17:10:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:19,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530982651] [2021-06-05 17:10:19,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530982651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512228646] [2021-06-05 17:10:19,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:19,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:19,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:19,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:19,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512228646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:20,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:10:20,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-05 17:10:20,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453073896] [2021-06-05 17:10:20,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:10:20,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:10:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:20,098 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:10:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:20,141 INFO L93 Difference]: Finished difference Result 264 states and 566 transitions. [2021-06-05 17:10:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:20,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-05 17:10:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:20,142 INFO L225 Difference]: With dead ends: 264 [2021-06-05 17:10:20,142 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 17:10:20,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:10:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 17:10:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2021-06-05 17:10:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.6764705882352942) internal successors, (285), 170 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 285 transitions. [2021-06-05 17:10:20,144 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 285 transitions. Word has length 19 [2021-06-05 17:10:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:20,144 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 285 transitions. [2021-06-05 17:10:20,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-05 17:10:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 285 transitions. [2021-06-05 17:10:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:20,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:20,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:20,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:20,345 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash -477505781, now seen corresponding path program 60 times [2021-06-05 17:10:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:20,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611361498] [2021-06-05 17:10:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:20,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:20,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611361498] [2021-06-05 17:10:20,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611361498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479024905] [2021-06-05 17:10:20,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:20,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:10:20,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:20,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 17:10:20,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479024905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:20,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:10:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900989494] [2021-06-05 17:10:20,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:10:20,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:20,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:10:20,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:10:20,416 INFO L87 Difference]: Start difference. First operand 171 states and 285 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:20,497 INFO L93 Difference]: Finished difference Result 213 states and 345 transitions. [2021-06-05 17:10:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:10:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 17:10:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:20,498 INFO L225 Difference]: With dead ends: 213 [2021-06-05 17:10:20,498 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 17:10:20,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 17:10:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-06-05 17:10:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-06-05 17:10:20,500 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 21 [2021-06-05 17:10:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:20,500 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-06-05 17:10:20,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-06-05 17:10:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:20,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:20,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:20,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:20,701 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:20,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1317377295, now seen corresponding path program 61 times [2021-06-05 17:10:20,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:20,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099475962] [2021-06-05 17:10:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:20,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:20,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099475962] [2021-06-05 17:10:20,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099475962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027964382] [2021-06-05 17:10:20,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 17:10:20,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027964382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:20,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 17:10:20,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214382950] [2021-06-05 17:10:20,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:20,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:20,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:20,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:20,768 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:20,854 INFO L93 Difference]: Finished difference Result 199 states and 319 transitions. [2021-06-05 17:10:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:10:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 17:10:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:20,854 INFO L225 Difference]: With dead ends: 199 [2021-06-05 17:10:20,854 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 17:10:20,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 17:10:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 155. [2021-06-05 17:10:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-06-05 17:10:20,856 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-06-05 17:10:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-06-05 17:10:20,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-06-05 17:10:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:20,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:20,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:21,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:21,057 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash -25018099, now seen corresponding path program 62 times [2021-06-05 17:10:21,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:21,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740220352] [2021-06-05 17:10:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740220352] [2021-06-05 17:10:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740220352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367969497] [2021-06-05 17:10:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:21,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:10:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367969497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:21,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-06-05 17:10:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861757206] [2021-06-05 17:10:21,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:21,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:21,232 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:21,503 INFO L93 Difference]: Finished difference Result 190 states and 305 transitions. [2021-06-05 17:10:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:10:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 17:10:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:21,503 INFO L225 Difference]: With dead ends: 190 [2021-06-05 17:10:21,503 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 17:10:21,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:10:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 17:10:21,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-06-05 17:10:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-06-05 17:10:21,505 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-06-05 17:10:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:21,505 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-06-05 17:10:21,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-06-05 17:10:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:21,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:21,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:21,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 17:10:21,706 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:21,706 INFO L82 PathProgramCache]: Analyzing trace with hash -856436821, now seen corresponding path program 63 times [2021-06-05 17:10:21,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:21,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705381311] [2021-06-05 17:10:21,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:21,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705381311] [2021-06-05 17:10:21,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705381311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626987864] [2021-06-05 17:10:21,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:21,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:10:21,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:21,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:21,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626987864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:21,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-06-05 17:10:21,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043669818] [2021-06-05 17:10:21,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:21,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:21,854 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:22,292 INFO L93 Difference]: Finished difference Result 203 states and 330 transitions. [2021-06-05 17:10:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:10:22,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 17:10:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:22,293 INFO L225 Difference]: With dead ends: 203 [2021-06-05 17:10:22,293 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 17:10:22,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=368, Invalid=1272, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:10:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 17:10:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-06-05 17:10:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.6875) internal successors, (243), 144 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 243 transitions. [2021-06-05 17:10:22,297 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 243 transitions. Word has length 21 [2021-06-05 17:10:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:22,297 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 243 transitions. [2021-06-05 17:10:22,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 243 transitions. [2021-06-05 17:10:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:22,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:22,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:22,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:22,499 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1784149655, now seen corresponding path program 64 times [2021-06-05 17:10:22,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:22,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806835773] [2021-06-05 17:10:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:22,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806835773] [2021-06-05 17:10:22,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806835773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334157965] [2021-06-05 17:10:22,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:22,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 17:10:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334157965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:22,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:22,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:10:22,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319636821] [2021-06-05 17:10:22,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:10:22,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:10:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:22,801 INFO L87 Difference]: Start difference. First operand 145 states and 243 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:23,212 INFO L93 Difference]: Finished difference Result 244 states and 400 transitions. [2021-06-05 17:10:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:10:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:23,213 INFO L225 Difference]: With dead ends: 244 [2021-06-05 17:10:23,213 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 17:10:23,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:10:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 17:10:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 167. [2021-06-05 17:10:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-06-05 17:10:23,215 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 23 [2021-06-05 17:10:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:23,216 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-06-05 17:10:23,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-06-05 17:10:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:23,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:23,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:23,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:23,421 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2003485607, now seen corresponding path program 65 times [2021-06-05 17:10:23,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:23,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93918377] [2021-06-05 17:10:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:23,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93918377] [2021-06-05 17:10:23,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93918377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370282396] [2021-06-05 17:10:23,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:23,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:23,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:10:23,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370282396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:23,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:23,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 17:10:23,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624034271] [2021-06-05 17:10:23,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:10:23,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:23,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:10:23,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:10:23,758 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:24,303 INFO L93 Difference]: Finished difference Result 206 states and 330 transitions. [2021-06-05 17:10:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:10:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:24,303 INFO L225 Difference]: With dead ends: 206 [2021-06-05 17:10:24,303 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 17:10:24,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:10:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 17:10:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-06-05 17:10:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.6312056737588652) internal successors, (230), 141 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2021-06-05 17:10:24,305 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 23 [2021-06-05 17:10:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:24,305 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2021-06-05 17:10:24,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2021-06-05 17:10:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:24,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:24,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:24,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 17:10:24,506 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:24,507 INFO L82 PathProgramCache]: Analyzing trace with hash 677219321, now seen corresponding path program 66 times [2021-06-05 17:10:24,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:24,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422396868] [2021-06-05 17:10:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:24,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422396868] [2021-06-05 17:10:24,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422396868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348675171] [2021-06-05 17:10:24,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:24,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:10:24,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:24,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:10:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348675171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:24,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:10:24,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338072979] [2021-06-05 17:10:24,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:10:24,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:24,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:10:24,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:10:24,859 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:25,309 INFO L93 Difference]: Finished difference Result 182 states and 286 transitions. [2021-06-05 17:10:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:10:25,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:25,310 INFO L225 Difference]: With dead ends: 182 [2021-06-05 17:10:25,310 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 17:10:25,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:10:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 17:10:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2021-06-05 17:10:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6120689655172413) internal successors, (187), 116 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 187 transitions. [2021-06-05 17:10:25,311 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 187 transitions. Word has length 23 [2021-06-05 17:10:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:25,312 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 187 transitions. [2021-06-05 17:10:25,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 187 transitions. [2021-06-05 17:10:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:25,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:25,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:25,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:25,517 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1752930477, now seen corresponding path program 67 times [2021-06-05 17:10:25,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:25,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993174031] [2021-06-05 17:10:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:25,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:25,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993174031] [2021-06-05 17:10:25,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993174031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:25,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761694230] [2021-06-05 17:10:25,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:25,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:10:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:25,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761694230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:25,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:25,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:10:25,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801444683] [2021-06-05 17:10:25,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:10:25,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:25,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:10:25,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:10:25,839 INFO L87 Difference]: Start difference. First operand 117 states and 187 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:26,329 INFO L93 Difference]: Finished difference Result 147 states and 230 transitions. [2021-06-05 17:10:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:10:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:26,329 INFO L225 Difference]: With dead ends: 147 [2021-06-05 17:10:26,330 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 17:10:26,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:10:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 17:10:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-06-05 17:10:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2021-06-05 17:10:26,331 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 23 [2021-06-05 17:10:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:26,331 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2021-06-05 17:10:26,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2021-06-05 17:10:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:26,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:26,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:26,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 17:10:26,541 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1920453071, now seen corresponding path program 68 times [2021-06-05 17:10:26,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:26,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032934427] [2021-06-05 17:10:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:26,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032934427] [2021-06-05 17:10:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032934427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297092071] [2021-06-05 17:10:26,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:26,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:26,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:10:26,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:26,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297092071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:26,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:26,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:10:26,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185195359] [2021-06-05 17:10:26,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:10:26,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:26,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:10:26,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:10:26,873 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:27,200 INFO L93 Difference]: Finished difference Result 117 states and 172 transitions. [2021-06-05 17:10:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:10:27,200 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:27,201 INFO L225 Difference]: With dead ends: 117 [2021-06-05 17:10:27,201 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 17:10:27,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:10:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 17:10:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-06-05 17:10:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 84 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 125 transitions. [2021-06-05 17:10:27,202 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 125 transitions. Word has length 23 [2021-06-05 17:10:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:27,202 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 125 transitions. [2021-06-05 17:10:27,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 125 transitions. [2021-06-05 17:10:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:27,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:27,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:27,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 17:10:27,403 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash 827116973, now seen corresponding path program 69 times [2021-06-05 17:10:27,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:27,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084241581] [2021-06-05 17:10:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:27,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:27,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084241581] [2021-06-05 17:10:27,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084241581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:27,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693880834] [2021-06-05 17:10:27,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:27,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:10:27,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:27,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:27,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:27,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693880834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:27,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:27,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 17:10:27,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465371562] [2021-06-05 17:10:27,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:10:27,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:10:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:10:27,751 INFO L87 Difference]: Start difference. First operand 85 states and 125 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:28,203 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2021-06-05 17:10:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:10:28,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:28,204 INFO L225 Difference]: With dead ends: 111 [2021-06-05 17:10:28,204 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 17:10:28,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:10:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 17:10:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-06-05 17:10:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2021-06-05 17:10:28,206 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 23 [2021-06-05 17:10:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:28,206 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2021-06-05 17:10:28,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2021-06-05 17:10:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:28,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:28,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:28,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 17:10:28,426 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1790978285, now seen corresponding path program 70 times [2021-06-05 17:10:28,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:28,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044125637] [2021-06-05 17:10:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:28,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:28,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044125637] [2021-06-05 17:10:28,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044125637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:28,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93381927] [2021-06-05 17:10:28,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:28,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:28,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 17:10:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:28,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93381927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:28,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:28,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:10:28,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985198628] [2021-06-05 17:10:28,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:10:28,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:28,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:10:28,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:28,750 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:29,306 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-06-05 17:10:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:10:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:29,306 INFO L225 Difference]: With dead ends: 130 [2021-06-05 17:10:29,306 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 17:10:29,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:10:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 17:10:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2021-06-05 17:10:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.475) internal successors, (118), 80 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 118 transitions. [2021-06-05 17:10:29,308 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 118 transitions. Word has length 23 [2021-06-05 17:10:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:29,308 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 118 transitions. [2021-06-05 17:10:29,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 118 transitions. [2021-06-05 17:10:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:29,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:29,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:29,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:29,521 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash -266912117, now seen corresponding path program 71 times [2021-06-05 17:10:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:29,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791584065] [2021-06-05 17:10:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:29,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:29,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791584065] [2021-06-05 17:10:29,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791584065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:29,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576852976] [2021-06-05 17:10:29,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:29,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:29,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:29,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:10:29,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576852976] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:29,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:10:29,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2021-06-05 17:10:29,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685245508] [2021-06-05 17:10:29,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:10:29,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:29,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:10:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:10:29,807 INFO L87 Difference]: Start difference. First operand 81 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:29,876 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2021-06-05 17:10:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:10:29,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:29,877 INFO L225 Difference]: With dead ends: 88 [2021-06-05 17:10:29,877 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 17:10:29,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 17:10:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-06-05 17:10:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-06-05 17:10:29,878 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 23 [2021-06-05 17:10:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:29,878 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-06-05 17:10:29,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-06-05 17:10:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:10:29,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:29,878 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:30,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 17:10:30,079 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:30,079 INFO L82 PathProgramCache]: Analyzing trace with hash 516021093, now seen corresponding path program 72 times [2021-06-05 17:10:30,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:30,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078926416] [2021-06-05 17:10:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:30,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:30,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078926416] [2021-06-05 17:10:30,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078926416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:30,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694816444] [2021-06-05 17:10:30,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:30,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:10:30,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:30,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:10:30,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 17:10:30,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694816444] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:30,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:10:30,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 22 [2021-06-05 17:10:30,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085164424] [2021-06-05 17:10:30,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:10:30,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:10:30,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:30,442 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:30,473 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-06-05 17:10:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:30,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-06-05 17:10:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:30,473 INFO L225 Difference]: With dead ends: 38 [2021-06-05 17:10:30,473 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 17:10:30,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 17:10:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 17:10:30,473 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) [2021-06-05 17:10:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 17:10:30,473 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-06-05 17:10:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:30,474 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 17:10:30,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 17:10:30,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 17:10:30,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 17:10:30,675 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:10:30,677 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:10:30 BasicIcfg [2021-06-05 17:10:30,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:10:30,678 INFO L168 Benchmark]: Toolchain (without parser) took 66435.53 ms. Allocated memory was 377.5 MB in the beginning and 453.0 MB in the end (delta: 75.5 MB). Free memory was 357.0 MB in the beginning and 321.2 MB in the end (delta: 35.8 MB). Peak memory consumption was 113.3 MB. Max. memory is 16.0 GB. [2021-06-05 17:10:30,678 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 377.5 MB. Free memory is still 358.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:10:30,678 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.69 ms. Allocated memory is still 377.5 MB. Free memory was 357.0 MB in the beginning and 355.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:10:30,678 INFO L168 Benchmark]: Boogie Preprocessor took 15.12 ms. Allocated memory is still 377.5 MB. Free memory was 355.5 MB in the beginning and 354.5 MB in the end (delta: 940.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:10:30,678 INFO L168 Benchmark]: RCFGBuilder took 201.67 ms. Allocated memory is still 377.5 MB. Free memory was 354.5 MB in the beginning and 344.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 17:10:30,679 INFO L168 Benchmark]: TraceAbstraction took 66191.16 ms. Allocated memory was 377.5 MB in the beginning and 453.0 MB in the end (delta: 75.5 MB). Free memory was 344.1 MB in the beginning and 321.2 MB in the end (delta: 22.9 MB). Peak memory consumption was 98.7 MB. Max. memory is 16.0 GB. [2021-06-05 17:10:30,683 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 0.13 ms. Allocated memory is still 377.5 MB. Free memory is still 358.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.69 ms. Allocated memory is still 377.5 MB. Free memory was 357.0 MB in the beginning and 355.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.12 ms. Allocated memory is still 377.5 MB. Free memory was 355.5 MB in the beginning and 354.5 MB in the end (delta: 940.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 201.67 ms. Allocated memory is still 377.5 MB. Free memory was 354.5 MB in the beginning and 344.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 66191.16 ms. Allocated memory was 377.5 MB in the beginning and 453.0 MB in the end (delta: 75.5 MB). Free memory was 344.1 MB in the beginning and 321.2 MB in the end (delta: 22.9 MB). Peak memory consumption was 98.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 66111.9ms, OverallIterations: 104, TraceHistogramMax: 3, EmptinessCheckTime: 84.4ms, AutomataDifference: 26857.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 49.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2410 SDtfs, 4546 SDslu, 13187 SDs, 0 SdLazy, 28551 SolverSat, 1596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11045.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3278 GetRequests, 837 SyntacticMatches, 142 SemanticMatches, 2299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12401 ImplicationChecksByTransitivity, 27729.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=533occurred in iteration=78, InterpolantAutomatonStates: 1578, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 404.8ms AutomataMinimizationTime, 104 MinimizatonAttempts, 4705 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 155.3ms SsaConstructionTime, 567.6ms SatisfiabilityAnalysisTime, 20503.8ms InterpolantComputationTime, 3387 NumberOfCodeBlocks, 3387 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 3208 ConstructedInterpolants, 0 QuantifiedInterpolants, 26694 SizeOfPredicates, 270 NumberOfNonLiveVariables, 2838 ConjunctsInSsa, 1021 ConjunctsInUnsatCore, 179 InterpolantComputations, 39 PerfectInterpolantSequences, 107/455 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...