/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:24:46,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:24:46,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:24:46,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 17:24:46,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 17:24:46,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 17:24:46,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 17:24:46,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 17:24:46,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 17:24:46,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 17:24:46,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 17:24:46,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 17:24:46,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 17:24:46,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 17:24:46,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 17:24:46,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 17:24:46,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 17:24:46,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 17:24:46,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 17:24:46,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 17:24:46,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 17:24:46,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 17:24:46,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 17:24:46,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 17:24:46,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 17:24:46,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 17:24:46,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 17:24:46,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 17:24:46,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 17:24:46,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 17:24:46,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 17:24:46,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 17:24:46,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 17:24:46,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 17:24:46,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 17:24:46,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 17:24:46,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 17:24:46,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 17:24:46,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 17:24:46,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 17:24:46,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 17:24:46,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:24:46,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:24:46,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:24:46,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:24:46,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:24:46,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:24:46,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:24:46,241 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:24:46,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:24:46,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:24:46,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:24:46,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:24:46,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:24:46,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:24:46,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:24:46,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:24:46,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:24:46,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:24:46,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:24:46,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:24:46,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:24:46,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:24:46,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:24:46,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:24:46,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:24:46,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:24:46,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:24:46,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:24:46,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:24:46,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:24:46,245 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:24:46,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:24:46,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:24:46,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:24:46,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:24:46,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:24:46,600 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:24:46,602 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:24:46,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl [2021-07-09 17:24:46,603 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl' [2021-07-09 17:24:46,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:24:46,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:24:46,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:24:46,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:24:46,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:24:46,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:24:46,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:24:46,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:24:46,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:24:46,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/1) ... [2021-07-09 17:24:46,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:24:46,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:24:46,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:24:46,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:24:46,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (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 [2021-07-09 17:24:46,761 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:24:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:24:46,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:24:46,761 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:24:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:24:46,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:24:46,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:24:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:24:46,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:24:46,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:24:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:24:46,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:24:46,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:24:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:24:46,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:24:46,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-09 17:24:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-09 17:24:46,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-09 17:24:46,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-07-09 17:24:46,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-07-09 17:24:46,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-07-09 17:24:46,766 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:24:46,909 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:24:46,909 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:24:46,911 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:24:46 BoogieIcfgContainer [2021-07-09 17:24:46,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:24:46,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:24:46,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:24:46,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:24:46,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:24:46" (1/2) ... [2021-07-09 17:24:46,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d42827 and model type exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:24:46, skipping insertion in model container [2021-07-09 17:24:46,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:24:46" (2/2) ... [2021-07-09 17:24:46,919 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3.wvr.bpl [2021-07-09 17:24:46,945 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:24:46,945 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:24:46,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:24:46,946 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:24:47,050 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-07-09 17:24:47,071 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-07-09 17:24:47,087 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:24:47,087 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:24:47,088 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:24:47,088 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:24:47,088 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:24:47,088 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:24:47,088 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:24:47,088 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:24:47,100 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 47 transitions, 142 flow [2021-07-09 17:24:47,451 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6829 states, 6828 states have (on average 5.865992970123023) internal successors, (40053), 6828 states have internal predecessors, (40053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 6829 states, 6828 states have (on average 5.865992970123023) internal successors, (40053), 6828 states have internal predecessors, (40053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:24:47,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:47,571 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:47,573 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:24:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1044529094, now seen corresponding path program 1 times [2021-07-09 17:24:47,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:47,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392478474] [2021-07-09 17:24:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:47,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392478474] [2021-07-09 17:24:47,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392478474] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:47,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:47,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:24:47,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180291203] [2021-07-09 17:24:47,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:24:47,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:47,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:24:47,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:24:47,841 INFO L87 Difference]: Start difference. First operand has 6829 states, 6828 states have (on average 5.865992970123023) internal successors, (40053), 6828 states have internal predecessors, (40053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:48,403 INFO L93 Difference]: Finished difference Result 13654 states and 80102 transitions. [2021-07-09 17:24:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:24:48,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:24:48,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:48,764 INFO L225 Difference]: With dead ends: 13654 [2021-07-09 17:24:48,765 INFO L226 Difference]: Without dead ends: 13527 [2021-07-09 17:24:48,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:24:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2021-07-09 17:24:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 8158. [2021-07-09 17:24:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 5.851538555841609) internal successors, (47731), 8157 states have internal predecessors, (47731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 47731 transitions. [2021-07-09 17:24:49,689 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 47731 transitions. Word has length 27 [2021-07-09 17:24:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:49,690 INFO L482 AbstractCegarLoop]: Abstraction has 8158 states and 47731 transitions. [2021-07-09 17:24:49,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 47731 transitions. [2021-07-09 17:24:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:49,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:49,735 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:49,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:24:49,736 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:24:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:49,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1567455164, now seen corresponding path program 1 times [2021-07-09 17:24:49,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:49,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821941957] [2021-07-09 17:24:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:49,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:49,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821941957] [2021-07-09 17:24:49,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821941957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:49,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112413943] [2021-07-09 17:24:49,909 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 [2021-07-09 17:24:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:24:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:50,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112413943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:50,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:50,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 17:24:50,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30034847] [2021-07-09 17:24:50,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:24:50,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:24:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:24:50,061 INFO L87 Difference]: Start difference. First operand 8158 states and 47731 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:50,640 INFO L93 Difference]: Finished difference Result 21114 states and 121111 transitions. [2021-07-09 17:24:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:24:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:51,043 INFO L225 Difference]: With dead ends: 21114 [2021-07-09 17:24:51,044 INFO L226 Difference]: Without dead ends: 21114 [2021-07-09 17:24:51,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:24:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-07-09 17:24:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 10411. [2021-07-09 17:24:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 5.94447646493756) internal successors, (61882), 10410 states have internal predecessors, (61882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 61882 transitions. [2021-07-09 17:24:52,196 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 61882 transitions. Word has length 29 [2021-07-09 17:24:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:52,225 INFO L482 AbstractCegarLoop]: Abstraction has 10411 states and 61882 transitions. [2021-07-09 17:24:52,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 61882 transitions. [2021-07-09 17:24:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:52,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:52,327 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:52,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:24:52,541 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:24:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1130933432, now seen corresponding path program 1 times [2021-07-09 17:24:52,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:52,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467024911] [2021-07-09 17:24:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:52,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:52,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467024911] [2021-07-09 17:24:52,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467024911] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:52,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:52,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:24:52,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435201321] [2021-07-09 17:24:52,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:52,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:52,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:52,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:52,587 INFO L87 Difference]: Start difference. First operand 10411 states and 61882 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:24:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:53,039 INFO L93 Difference]: Finished difference Result 14973 states and 85568 transitions. [2021-07-09 17:24:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:24:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:24:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:53,258 INFO L225 Difference]: With dead ends: 14973 [2021-07-09 17:24:53,258 INFO L226 Difference]: Without dead ends: 14893 [2021-07-09 17:24:53,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14893 states. [2021-07-09 17:24:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14893 to 11995. [2021-07-09 17:24:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11994 states have (on average 5.837335334333834) internal successors, (70013), 11994 states have internal predecessors, (70013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 70013 transitions. [2021-07-09 17:24:54,139 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 70013 transitions. Word has length 29 [2021-07-09 17:24:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:54,140 INFO L482 AbstractCegarLoop]: Abstraction has 11995 states and 70013 transitions. [2021-07-09 17:24:54,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:24:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 70013 transitions. [2021-07-09 17:24:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:54,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:54,221 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:54,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:24:54,222 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:24:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:54,222 INFO L82 PathProgramCache]: Analyzing trace with hash 133583944, now seen corresponding path program 1 times [2021-07-09 17:24:54,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:54,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412094702] [2021-07-09 17:24:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:54,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:54,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412094702] [2021-07-09 17:24:54,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412094702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:54,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456728232] [2021-07-09 17:24:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:24:54,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:54,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456728232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:54,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:54,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:24:54,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471336153] [2021-07-09 17:24:54,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:54,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:54,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:54,426 INFO L87 Difference]: Start difference. First operand 11995 states and 70013 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:24:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:54,951 INFO L93 Difference]: Finished difference Result 30637 states and 176852 transitions. [2021-07-09 17:24:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:24:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:55,276 INFO L225 Difference]: With dead ends: 30637 [2021-07-09 17:24:55,276 INFO L226 Difference]: Without dead ends: 30637 [2021-07-09 17:24:55,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30637 states. [2021-07-09 17:24:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30637 to 15205. [2021-07-09 17:24:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15205 states, 15204 states have (on average 5.956393054459353) internal successors, (90561), 15204 states have internal predecessors, (90561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15205 states to 15205 states and 90561 transitions. [2021-07-09 17:24:56,507 INFO L78 Accepts]: Start accepts. Automaton has 15205 states and 90561 transitions. Word has length 29 [2021-07-09 17:24:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:56,508 INFO L482 AbstractCegarLoop]: Abstraction has 15205 states and 90561 transitions. [2021-07-09 17:24:56,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:24:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 15205 states and 90561 transitions. [2021-07-09 17:24:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:56,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:56,578 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:56,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:56,781 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:24:56,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:56,782 INFO L82 PathProgramCache]: Analyzing trace with hash -8467834, now seen corresponding path program 1 times [2021-07-09 17:24:56,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:56,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143674470] [2021-07-09 17:24:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:56,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:56,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143674470] [2021-07-09 17:24:56,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143674470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:56,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298123359] [2021-07-09 17:24:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:24:56,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:56,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298123359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:56,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:56,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:24:56,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550544078] [2021-07-09 17:24:56,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:56,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:56,926 INFO L87 Difference]: Start difference. First operand 15205 states and 90561 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:24:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:57,489 INFO L93 Difference]: Finished difference Result 36877 states and 218066 transitions. [2021-07-09 17:24:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:24:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:58,018 INFO L225 Difference]: With dead ends: 36877 [2021-07-09 17:24:58,019 INFO L226 Difference]: Without dead ends: 36877 [2021-07-09 17:24:58,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36877 states. [2021-07-09 17:24:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36877 to 20146. [2021-07-09 17:24:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20146 states, 20145 states have (on average 6.068304790270538) internal successors, (122246), 20145 states have internal predecessors, (122246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20146 states to 20146 states and 122246 transitions. [2021-07-09 17:24:59,290 INFO L78 Accepts]: Start accepts. Automaton has 20146 states and 122246 transitions. Word has length 29 [2021-07-09 17:24:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:59,291 INFO L482 AbstractCegarLoop]: Abstraction has 20146 states and 122246 transitions. [2021-07-09 17:24:59,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:24:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20146 states and 122246 transitions. [2021-07-09 17:24:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:59,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:59,604 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:59,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:59,817 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:24:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1681375674, now seen corresponding path program 1 times [2021-07-09 17:24:59,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:59,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220828123] [2021-07-09 17:24:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:59,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:59,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220828123] [2021-07-09 17:24:59,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220828123] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:59,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:59,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:24:59,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846607040] [2021-07-09 17:24:59,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:24:59,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:59,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:24:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:24:59,864 INFO L87 Difference]: Start difference. First operand 20146 states and 122246 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:00,234 INFO L93 Difference]: Finished difference Result 31288 states and 185448 transitions. [2021-07-09 17:25:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:25:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:00,784 INFO L225 Difference]: With dead ends: 31288 [2021-07-09 17:25:00,784 INFO L226 Difference]: Without dead ends: 31121 [2021-07-09 17:25:00,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31121 states. [2021-07-09 17:25:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31121 to 21451. [2021-07-09 17:25:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21451 states, 21450 states have (on average 6.020652680652681) internal successors, (129143), 21450 states have internal predecessors, (129143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21451 states to 21451 states and 129143 transitions. [2021-07-09 17:25:01,951 INFO L78 Accepts]: Start accepts. Automaton has 21451 states and 129143 transitions. Word has length 29 [2021-07-09 17:25:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:01,952 INFO L482 AbstractCegarLoop]: Abstraction has 21451 states and 129143 transitions. [2021-07-09 17:25:01,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21451 states and 129143 transitions. [2021-07-09 17:25:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:02,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:02,034 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:02,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:25:02,035 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:02,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1659787256, now seen corresponding path program 1 times [2021-07-09 17:25:02,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:02,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993886008] [2021-07-09 17:25:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:02,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:02,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993886008] [2021-07-09 17:25:02,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993886008] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:02,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:02,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:02,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327138584] [2021-07-09 17:25:02,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:02,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:02,073 INFO L87 Difference]: Start difference. First operand 21451 states and 129143 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:02,835 INFO L93 Difference]: Finished difference Result 36020 states and 210532 transitions. [2021-07-09 17:25:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:25:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:03,044 INFO L225 Difference]: With dead ends: 36020 [2021-07-09 17:25:03,045 INFO L226 Difference]: Without dead ends: 35844 [2021-07-09 17:25:03,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35844 states. [2021-07-09 17:25:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35844 to 23309. [2021-07-09 17:25:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23309 states, 23308 states have (on average 5.963188604770894) internal successors, (138990), 23308 states have internal predecessors, (138990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23309 states to 23309 states and 138990 transitions. [2021-07-09 17:25:04,542 INFO L78 Accepts]: Start accepts. Automaton has 23309 states and 138990 transitions. Word has length 29 [2021-07-09 17:25:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:04,542 INFO L482 AbstractCegarLoop]: Abstraction has 23309 states and 138990 transitions. [2021-07-09 17:25:04,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 23309 states and 138990 transitions. [2021-07-09 17:25:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:04,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:04,635 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:04,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:25:04,635 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash 25043654, now seen corresponding path program 2 times [2021-07-09 17:25:04,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:04,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461015421] [2021-07-09 17:25:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:04,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:04,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461015421] [2021-07-09 17:25:04,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461015421] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:04,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:04,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941116030] [2021-07-09 17:25:04,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:04,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:04,659 INFO L87 Difference]: Start difference. First operand 23309 states and 138990 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:05,380 INFO L93 Difference]: Finished difference Result 35264 states and 207669 transitions. [2021-07-09 17:25:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:25:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:05,648 INFO L225 Difference]: With dead ends: 35264 [2021-07-09 17:25:05,649 INFO L226 Difference]: Without dead ends: 35264 [2021-07-09 17:25:05,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35264 states. [2021-07-09 17:25:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35264 to 26215. [2021-07-09 17:25:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26215 states, 26214 states have (on average 5.978828107118334) internal successors, (156729), 26214 states have internal predecessors, (156729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26215 states to 26215 states and 156729 transitions. [2021-07-09 17:25:07,230 INFO L78 Accepts]: Start accepts. Automaton has 26215 states and 156729 transitions. Word has length 29 [2021-07-09 17:25:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:07,231 INFO L482 AbstractCegarLoop]: Abstraction has 26215 states and 156729 transitions. [2021-07-09 17:25:07,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26215 states and 156729 transitions. [2021-07-09 17:25:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:07,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:07,329 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:07,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:25:07,329 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:07,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1371840000, now seen corresponding path program 2 times [2021-07-09 17:25:07,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:07,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095029544] [2021-07-09 17:25:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:07,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095029544] [2021-07-09 17:25:07,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095029544] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:07,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:07,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:07,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117746804] [2021-07-09 17:25:07,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:07,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:07,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:07,370 INFO L87 Difference]: Start difference. First operand 26215 states and 156729 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:08,066 INFO L93 Difference]: Finished difference Result 35265 states and 205937 transitions. [2021-07-09 17:25:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:25:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:08,286 INFO L225 Difference]: With dead ends: 35265 [2021-07-09 17:25:08,286 INFO L226 Difference]: Without dead ends: 35115 [2021-07-09 17:25:08,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35115 states. [2021-07-09 17:25:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35115 to 27707. [2021-07-09 17:25:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27707 states, 27706 states have (on average 5.942972641305133) internal successors, (164656), 27706 states have internal predecessors, (164656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27707 states to 27707 states and 164656 transitions. [2021-07-09 17:25:09,908 INFO L78 Accepts]: Start accepts. Automaton has 27707 states and 164656 transitions. Word has length 29 [2021-07-09 17:25:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:09,908 INFO L482 AbstractCegarLoop]: Abstraction has 27707 states and 164656 transitions. [2021-07-09 17:25:09,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27707 states and 164656 transitions. [2021-07-09 17:25:10,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:10,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:10,000 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:10,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:25:10,001 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash -490301020, now seen corresponding path program 2 times [2021-07-09 17:25:10,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:10,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203842905] [2021-07-09 17:25:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:10,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203842905] [2021-07-09 17:25:10,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203842905] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:10,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:10,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:10,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12903770] [2021-07-09 17:25:10,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:10,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:10,029 INFO L87 Difference]: Start difference. First operand 27707 states and 164656 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:10,821 INFO L93 Difference]: Finished difference Result 45133 states and 263334 transitions. [2021-07-09 17:25:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:10,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:25:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:11,122 INFO L225 Difference]: With dead ends: 45133 [2021-07-09 17:25:11,122 INFO L226 Difference]: Without dead ends: 45133 [2021-07-09 17:25:11,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45133 states. [2021-07-09 17:25:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45133 to 32206. [2021-07-09 17:25:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32206 states, 32205 states have (on average 5.952895513119081) internal successors, (191713), 32205 states have internal predecessors, (191713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32206 states to 32206 states and 191713 transitions. [2021-07-09 17:25:12,927 INFO L78 Accepts]: Start accepts. Automaton has 32206 states and 191713 transitions. Word has length 29 [2021-07-09 17:25:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:12,928 INFO L482 AbstractCegarLoop]: Abstraction has 32206 states and 191713 transitions. [2021-07-09 17:25:12,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 32206 states and 191713 transitions. [2021-07-09 17:25:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:13,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:13,050 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:13,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:25:13,051 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1923189408, now seen corresponding path program 2 times [2021-07-09 17:25:13,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:13,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066074646] [2021-07-09 17:25:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:13,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:13,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066074646] [2021-07-09 17:25:13,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066074646] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:13,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:13,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143559414] [2021-07-09 17:25:13,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:13,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:13,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:13,087 INFO L87 Difference]: Start difference. First operand 32206 states and 191713 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:13,938 INFO L93 Difference]: Finished difference Result 45104 states and 260644 transitions. [2021-07-09 17:25:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 29 [2021-07-09 17:25:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:14,549 INFO L225 Difference]: With dead ends: 45104 [2021-07-09 17:25:14,550 INFO L226 Difference]: Without dead ends: 44872 [2021-07-09 17:25:14,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44872 states. [2021-07-09 17:25:15,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44872 to 34465. [2021-07-09 17:25:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34465 states, 34464 states have (on average 5.9103122098421546) internal successors, (203693), 34464 states have internal predecessors, (203693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34465 states to 34465 states and 203693 transitions. [2021-07-09 17:25:16,480 INFO L78 Accepts]: Start accepts. Automaton has 34465 states and 203693 transitions. Word has length 29 [2021-07-09 17:25:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:16,480 INFO L482 AbstractCegarLoop]: Abstraction has 34465 states and 203693 transitions. [2021-07-09 17:25:16,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2021-07-09 17:25:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 34465 states and 203693 transitions. [2021-07-09 17:25:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:16,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:16,646 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:16,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 17:25:16,646 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:16,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2077952268, now seen corresponding path program 2 times [2021-07-09 17:25:16,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:16,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514252967] [2021-07-09 17:25:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:16,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:16,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514252967] [2021-07-09 17:25:16,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514252967] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:16,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:16,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:25:16,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528752105] [2021-07-09 17:25:16,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:16,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:16,675 INFO L87 Difference]: Start difference. First operand 34465 states and 203693 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 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) [2021-07-09 17:25:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:17,683 INFO L93 Difference]: Finished difference Result 47735 states and 276681 transitions. [2021-07-09 17:25:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 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 29 [2021-07-09 17:25:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:18,007 INFO L225 Difference]: With dead ends: 47735 [2021-07-09 17:25:18,007 INFO L226 Difference]: Without dead ends: 47735 [2021-07-09 17:25:18,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47735 states. [2021-07-09 17:25:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47735 to 37708. [2021-07-09 17:25:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37708 states, 37707 states have (on average 5.9143660328321) internal successors, (223013), 37707 states have internal predecessors, (223013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37708 states to 37708 states and 223013 transitions. [2021-07-09 17:25:19,978 INFO L78 Accepts]: Start accepts. Automaton has 37708 states and 223013 transitions. Word has length 29 [2021-07-09 17:25:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:19,979 INFO L482 AbstractCegarLoop]: Abstraction has 37708 states and 223013 transitions. [2021-07-09 17:25:19,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 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) [2021-07-09 17:25:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 37708 states and 223013 transitions. [2021-07-09 17:25:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:20,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:20,112 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:20,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 17:25:20,112 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1308062790, now seen corresponding path program 1 times [2021-07-09 17:25:20,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:20,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658881708] [2021-07-09 17:25:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:20,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:20,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658881708] [2021-07-09 17:25:20,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658881708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340070020] [2021-07-09 17:25:20,193 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 [2021-07-09 17:25:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:25:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:20,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340070020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:20,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-09 17:25:20,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226024684] [2021-07-09 17:25:20,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:20,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:20,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:20,374 INFO L87 Difference]: Start difference. First operand 37708 states and 223013 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:21,373 INFO L93 Difference]: Finished difference Result 48610 states and 280421 transitions. [2021-07-09 17:25:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 31 [2021-07-09 17:25:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:22,005 INFO L225 Difference]: With dead ends: 48610 [2021-07-09 17:25:22,006 INFO L226 Difference]: Without dead ends: 48062 [2021-07-09 17:25:22,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:22,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48062 states. [2021-07-09 17:25:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48062 to 40315. [2021-07-09 17:25:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40315 states, 40314 states have (on average 5.896785235898199) internal successors, (237723), 40314 states have internal predecessors, (237723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40315 states to 40315 states and 237723 transitions. [2021-07-09 17:25:24,103 INFO L78 Accepts]: Start accepts. Automaton has 40315 states and 237723 transitions. Word has length 31 [2021-07-09 17:25:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:24,103 INFO L482 AbstractCegarLoop]: Abstraction has 40315 states and 237723 transitions. [2021-07-09 17:25:24,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 40315 states and 237723 transitions. [2021-07-09 17:25:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:24,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:24,244 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:24,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:24,445 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash -280107528, now seen corresponding path program 2 times [2021-07-09 17:25:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943635757] [2021-07-09 17:25:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:24,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:24,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943635757] [2021-07-09 17:25:24,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943635757] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:24,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:24,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:24,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255821956] [2021-07-09 17:25:24,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:24,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:24,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:24,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:24,517 INFO L87 Difference]: Start difference. First operand 40315 states and 237723 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-07-09 17:25:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:25,629 INFO L93 Difference]: Finished difference Result 50404 states and 290958 transitions. [2021-07-09 17:25:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:25,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-07-09 17:25:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:25,948 INFO L225 Difference]: With dead ends: 50404 [2021-07-09 17:25:25,948 INFO L226 Difference]: Without dead ends: 49856 [2021-07-09 17:25:25,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2021-07-09 17:25:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 42372. [2021-07-09 17:25:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42372 states, 42371 states have (on average 5.882112765806802) internal successors, (249231), 42371 states have internal predecessors, (249231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42372 states to 42372 states and 249231 transitions. [2021-07-09 17:25:28,369 INFO L78 Accepts]: Start accepts. Automaton has 42372 states and 249231 transitions. Word has length 31 [2021-07-09 17:25:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:28,369 INFO L482 AbstractCegarLoop]: Abstraction has 42372 states and 249231 transitions. [2021-07-09 17:25:28,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-07-09 17:25:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42372 states and 249231 transitions. [2021-07-09 17:25:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:28,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:28,597 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:28,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 17:25:28,597 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash -904748022, now seen corresponding path program 1 times [2021-07-09 17:25:28,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:28,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640742794] [2021-07-09 17:25:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:28,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640742794] [2021-07-09 17:25:28,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640742794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338349232] [2021-07-09 17:25:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:25:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:25:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338349232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:28,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-09 17:25:28,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163987085] [2021-07-09 17:25:28,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:28,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:28,812 INFO L87 Difference]: Start difference. First operand 42372 states and 249231 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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) [2021-07-09 17:25:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:30,101 INFO L93 Difference]: Finished difference Result 53113 states and 305911 transitions. [2021-07-09 17:25:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:30,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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 31 [2021-07-09 17:25:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:30,769 INFO L225 Difference]: With dead ends: 53113 [2021-07-09 17:25:30,769 INFO L226 Difference]: Without dead ends: 52637 [2021-07-09 17:25:30,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52637 states. [2021-07-09 17:25:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52637 to 45439. [2021-07-09 17:25:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 45438 states have (on average 5.865487037281571) internal successors, (266516), 45438 states have internal predecessors, (266516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 266516 transitions. [2021-07-09 17:25:32,980 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 266516 transitions. Word has length 31 [2021-07-09 17:25:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:32,981 INFO L482 AbstractCegarLoop]: Abstraction has 45439 states and 266516 transitions. [2021-07-09 17:25:32,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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) [2021-07-09 17:25:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 266516 transitions. [2021-07-09 17:25:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:33,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:33,520 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:33,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:25:33,733 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:33,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1844291576, now seen corresponding path program 2 times [2021-07-09 17:25:33,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:33,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245711798] [2021-07-09 17:25:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:33,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:33,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245711798] [2021-07-09 17:25:33,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245711798] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:33,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:33,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:33,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013749629] [2021-07-09 17:25:33,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:33,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:33,782 INFO L87 Difference]: Start difference. First operand 45439 states and 266516 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-07-09 17:25:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:34,766 INFO L93 Difference]: Finished difference Result 55542 states and 319905 transitions. [2021-07-09 17:25:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-07-09 17:25:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:35,158 INFO L225 Difference]: With dead ends: 55542 [2021-07-09 17:25:35,158 INFO L226 Difference]: Without dead ends: 55066 [2021-07-09 17:25:35,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55066 states. [2021-07-09 17:25:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55066 to 48103. [2021-07-09 17:25:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48103 states, 48102 states have (on average 5.849070724709991) internal successors, (281352), 48102 states have internal predecessors, (281352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48103 states to 48103 states and 281352 transitions. [2021-07-09 17:25:37,829 INFO L78 Accepts]: Start accepts. Automaton has 48103 states and 281352 transitions. Word has length 31 [2021-07-09 17:25:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:37,830 INFO L482 AbstractCegarLoop]: Abstraction has 48103 states and 281352 transitions. [2021-07-09 17:25:37,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-07-09 17:25:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 48103 states and 281352 transitions. [2021-07-09 17:25:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:38,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:38,023 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:38,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 17:25:38,023 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash 858374, now seen corresponding path program 1 times [2021-07-09 17:25:38,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:38,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975230042] [2021-07-09 17:25:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:38,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:38,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975230042] [2021-07-09 17:25:38,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975230042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:38,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131998803] [2021-07-09 17:25:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:25:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:38,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:25:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:38,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131998803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:38,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:38,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-09 17:25:38,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959544133] [2021-07-09 17:25:38,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:38,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:38,241 INFO L87 Difference]: Start difference. First operand 48103 states and 281352 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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) [2021-07-09 17:25:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:39,303 INFO L93 Difference]: Finished difference Result 56784 states and 326793 transitions. [2021-07-09 17:25:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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 31 [2021-07-09 17:25:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:39,675 INFO L225 Difference]: With dead ends: 56784 [2021-07-09 17:25:39,675 INFO L226 Difference]: Without dead ends: 56381 [2021-07-09 17:25:39,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56381 states. [2021-07-09 17:25:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56381 to 50997. [2021-07-09 17:25:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50997 states, 50996 states have (on average 5.823652835516511) internal successors, (296983), 50996 states have internal predecessors, (296983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50997 states to 50997 states and 296983 transitions. [2021-07-09 17:25:42,436 INFO L78 Accepts]: Start accepts. Automaton has 50997 states and 296983 transitions. Word has length 31 [2021-07-09 17:25:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:42,436 INFO L482 AbstractCegarLoop]: Abstraction has 50997 states and 296983 transitions. [2021-07-09 17:25:42,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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) [2021-07-09 17:25:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 50997 states and 296983 transitions. [2021-07-09 17:25:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:42,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:42,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:42,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:25:42,827 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:42,828 INFO L82 PathProgramCache]: Analyzing trace with hash 309047268, now seen corresponding path program 2 times [2021-07-09 17:25:42,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:42,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695762656] [2021-07-09 17:25:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:42,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:42,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695762656] [2021-07-09 17:25:42,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695762656] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:42,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:42,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:25:42,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278153749] [2021-07-09 17:25:42,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:42,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:42,868 INFO L87 Difference]: Start difference. First operand 50997 states and 296983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-07-09 17:25:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:43,896 INFO L93 Difference]: Finished difference Result 58483 states and 336376 transitions. [2021-07-09 17:25:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-07-09 17:25:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:44,585 INFO L225 Difference]: With dead ends: 58483 [2021-07-09 17:25:44,585 INFO L226 Difference]: Without dead ends: 58080 [2021-07-09 17:25:44,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58080 states. [2021-07-09 17:25:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58080 to 53054. [2021-07-09 17:25:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53054 states, 53053 states have (on average 5.811565792697868) internal successors, (308321), 53053 states have internal predecessors, (308321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53054 states to 53054 states and 308321 transitions. [2021-07-09 17:25:47,451 INFO L78 Accepts]: Start accepts. Automaton has 53054 states and 308321 transitions. Word has length 31 [2021-07-09 17:25:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:47,451 INFO L482 AbstractCegarLoop]: Abstraction has 53054 states and 308321 transitions. [2021-07-09 17:25:47,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-07-09 17:25:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 53054 states and 308321 transitions. [2021-07-09 17:25:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:25:47,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:47,679 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:47,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-07-09 17:25:47,679 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:47,679 INFO L82 PathProgramCache]: Analyzing trace with hash 131288516, now seen corresponding path program 3 times [2021-07-09 17:25:47,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:47,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026301788] [2021-07-09 17:25:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:47,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:47,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026301788] [2021-07-09 17:25:47,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026301788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651723813] [2021-07-09 17:25:47,710 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 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 [2021-07-09 17:25:47,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:25:47,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:25:47,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:47,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651723813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:47,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:25:47,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541578259] [2021-07-09 17:25:47,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:25:47,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:25:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:25:47,840 INFO L87 Difference]: Start difference. First operand 53054 states and 308321 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:51,216 INFO L93 Difference]: Finished difference Result 166964 states and 963436 transitions. [2021-07-09 17:25:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:25:51,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:25:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:53,118 INFO L225 Difference]: With dead ends: 166964 [2021-07-09 17:25:53,119 INFO L226 Difference]: Without dead ends: 166964 [2021-07-09 17:25:53,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:25:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166964 states. [2021-07-09 17:25:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166964 to 71659. [2021-07-09 17:25:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71659 states, 71658 states have (on average 5.932080158530799) internal successors, (425081), 71658 states have internal predecessors, (425081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71659 states to 71659 states and 425081 transitions. [2021-07-09 17:25:59,201 INFO L78 Accepts]: Start accepts. Automaton has 71659 states and 425081 transitions. Word has length 33 [2021-07-09 17:25:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:59,201 INFO L482 AbstractCegarLoop]: Abstraction has 71659 states and 425081 transitions. [2021-07-09 17:25:59,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 71659 states and 425081 transitions. [2021-07-09 17:25:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:25:59,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:59,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:59,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:59,668 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:25:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1278122040, now seen corresponding path program 4 times [2021-07-09 17:25:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:59,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593951571] [2021-07-09 17:25:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593951571] [2021-07-09 17:25:59,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593951571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850306556] [2021-07-09 17:25:59,693 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 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 [2021-07-09 17:26:00,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:26:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850306556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:00,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:26:00,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597457602] [2021-07-09 17:26:00,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:26:00,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:00,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:26:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:00,216 INFO L87 Difference]: Start difference. First operand 71659 states and 425081 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:02,521 INFO L93 Difference]: Finished difference Result 151965 states and 880181 transitions. [2021-07-09 17:26:02,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:02,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:26:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:04,875 INFO L225 Difference]: With dead ends: 151965 [2021-07-09 17:26:04,875 INFO L226 Difference]: Without dead ends: 151069 [2021-07-09 17:26:04,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151069 states. [2021-07-09 17:26:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151069 to 98035. [2021-07-09 17:26:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98035 states, 98034 states have (on average 6.051471938307118) internal successors, (593250), 98034 states have internal predecessors, (593250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98035 states to 98035 states and 593250 transitions. [2021-07-09 17:26:12,610 INFO L78 Accepts]: Start accepts. Automaton has 98035 states and 593250 transitions. Word has length 33 [2021-07-09 17:26:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:12,610 INFO L482 AbstractCegarLoop]: Abstraction has 98035 states and 593250 transitions. [2021-07-09 17:26:12,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 98035 states and 593250 transitions. [2021-07-09 17:26:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:26:13,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:13,507 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:13,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,708 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:26:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1305965304, now seen corresponding path program 5 times [2021-07-09 17:26:13,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:13,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736726249] [2021-07-09 17:26:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:13,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736726249] [2021-07-09 17:26:13,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736726249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402454009] [2021-07-09 17:26:13,747 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 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 [2021-07-09 17:26:13,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:26:13,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:13,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:26:13,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402454009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:13,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:26:13,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855981100] [2021-07-09 17:26:13,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:26:13,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:26:13,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:13,874 INFO L87 Difference]: Start difference. First operand 98035 states and 593250 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:16,221 INFO L93 Difference]: Finished difference Result 145413 states and 850897 transitions. [2021-07-09 17:26:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:26:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:17,821 INFO L225 Difference]: With dead ends: 145413 [2021-07-09 17:26:17,821 INFO L226 Difference]: Without dead ends: 145413 [2021-07-09 17:26:17,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145413 states. [2021-07-09 17:26:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145413 to 96954. [2021-07-09 17:26:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96954 states, 96953 states have (on average 6.02823017338298) internal successors, (584455), 96953 states have internal predecessors, (584455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96954 states to 96954 states and 584455 transitions. [2021-07-09 17:26:24,885 INFO L78 Accepts]: Start accepts. Automaton has 96954 states and 584455 transitions. Word has length 33 [2021-07-09 17:26:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:24,886 INFO L482 AbstractCegarLoop]: Abstraction has 96954 states and 584455 transitions. [2021-07-09 17:26:24,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 96954 states and 584455 transitions. [2021-07-09 17:26:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:26:25,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:25,315 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:25,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,517 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:26:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1278439228, now seen corresponding path program 6 times [2021-07-09 17:26:25,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:25,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445995178] [2021-07-09 17:26:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:25,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445995178] [2021-07-09 17:26:25,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445995178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806586470] [2021-07-09 17:26:25,556 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 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 [2021-07-09 17:26:25,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:25,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:25,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:26:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806586470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:25,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:26:25,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936370170] [2021-07-09 17:26:25,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:26:25,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:25,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:26:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:25,691 INFO L87 Difference]: Start difference. First operand 96954 states and 584455 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:28,188 INFO L93 Difference]: Finished difference Result 133964 states and 783258 transitions. [2021-07-09 17:26:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:26:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:29,320 INFO L225 Difference]: With dead ends: 133964 [2021-07-09 17:26:29,321 INFO L226 Difference]: Without dead ends: 133804 [2021-07-09 17:26:29,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133804 states. [2021-07-09 17:26:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133804 to 97004. [2021-07-09 17:26:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97004 states, 97003 states have (on average 6.026844530581529) internal successors, (584622), 97003 states have internal predecessors, (584622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97004 states to 97004 states and 584622 transitions. [2021-07-09 17:26:36,197 INFO L78 Accepts]: Start accepts. Automaton has 97004 states and 584622 transitions. Word has length 33 [2021-07-09 17:26:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:36,197 INFO L482 AbstractCegarLoop]: Abstraction has 97004 states and 584622 transitions. [2021-07-09 17:26:36,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 97004 states and 584622 transitions. [2021-07-09 17:26:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:26:37,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:37,073 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:37,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:37,293 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:26:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash 11476090, now seen corresponding path program 7 times [2021-07-09 17:26:37,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:37,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035858931] [2021-07-09 17:26:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:37,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035858931] [2021-07-09 17:26:37,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035858931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143954020] [2021-07-09 17:26:37,345 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 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 [2021-07-09 17:26:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:26:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143954020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:37,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:26:37,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046270478] [2021-07-09 17:26:37,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:26:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:26:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:37,574 INFO L87 Difference]: Start difference. First operand 97004 states and 584622 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:43,196 INFO L93 Difference]: Finished difference Result 227012 states and 1346306 transitions. [2021-07-09 17:26:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 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 33 [2021-07-09 17:26:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:45,909 INFO L225 Difference]: With dead ends: 227012 [2021-07-09 17:26:45,909 INFO L226 Difference]: Without dead ends: 227012 [2021-07-09 17:26:45,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227012 states. [2021-07-09 17:26:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227012 to 126089. [2021-07-09 17:26:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126089 states, 126088 states have (on average 6.168192056341603) internal successors, (777735), 126088 states have internal predecessors, (777735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126089 states to 126089 states and 777735 transitions. [2021-07-09 17:26:56,460 INFO L78 Accepts]: Start accepts. Automaton has 126089 states and 777735 transitions. Word has length 33 [2021-07-09 17:26:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:56,460 INFO L482 AbstractCegarLoop]: Abstraction has 126089 states and 777735 transitions. [2021-07-09 17:26:56,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 126089 states and 777735 transitions. [2021-07-09 17:26:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:26:57,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:57,392 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:57,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:26:57,593 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:26:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:57,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1498559738, now seen corresponding path program 8 times [2021-07-09 17:26:57,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:57,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546671884] [2021-07-09 17:26:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:57,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:57,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546671884] [2021-07-09 17:26:57,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546671884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:57,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918763546] [2021-07-09 17:26:57,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:57,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:57,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:57,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:26:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:57,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918763546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:57,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:57,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:26:57,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735170600] [2021-07-09 17:26:57,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:26:57,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:26:57,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:57,759 INFO L87 Difference]: Start difference. First operand 126089 states and 777735 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:00,803 INFO L93 Difference]: Finished difference Result 173970 states and 1035526 transitions. [2021-07-09 17:27:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:00,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:27:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:03,062 INFO L225 Difference]: With dead ends: 173970 [2021-07-09 17:27:03,063 INFO L226 Difference]: Without dead ends: 173746 [2021-07-09 17:27:03,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:27:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173746 states. [2021-07-09 17:27:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173746 to 125926. [2021-07-09 17:27:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125926 states, 125925 states have (on average 6.16766329164185) internal successors, (776663), 125925 states have internal predecessors, (776663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125926 states to 125926 states and 776663 transitions. [2021-07-09 17:27:13,213 INFO L78 Accepts]: Start accepts. Automaton has 125926 states and 776663 transitions. Word has length 33 [2021-07-09 17:27:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:13,214 INFO L482 AbstractCegarLoop]: Abstraction has 125926 states and 776663 transitions. [2021-07-09 17:27:13,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 125926 states and 776663 transitions. [2021-07-09 17:27:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:27:14,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:14,732 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:14,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:27:14,932 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:27:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1518077302, now seen corresponding path program 9 times [2021-07-09 17:27:14,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:14,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74399057] [2021-07-09 17:27:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:14,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:14,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74399057] [2021-07-09 17:27:14,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74399057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:14,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948687854] [2021-07-09 17:27:14,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:15,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:15,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:27:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:15,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948687854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:15,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:15,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:27:15,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130051609] [2021-07-09 17:27:15,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:27:15,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:15,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:27:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:27:15,121 INFO L87 Difference]: Start difference. First operand 125926 states and 776663 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:18,904 INFO L93 Difference]: Finished difference Result 199329 states and 1186134 transitions. [2021-07-09 17:27:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:18,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 33 [2021-07-09 17:27:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:21,163 INFO L225 Difference]: With dead ends: 199329 [2021-07-09 17:27:21,163 INFO L226 Difference]: Without dead ends: 199329 [2021-07-09 17:27:21,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199329 states. [2021-07-09 17:27:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199329 to 128232. [2021-07-09 17:27:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128232 states, 128231 states have (on average 6.171487393843922) internal successors, (791376), 128231 states have internal predecessors, (791376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128232 states to 128232 states and 791376 transitions. [2021-07-09 17:27:31,443 INFO L78 Accepts]: Start accepts. Automaton has 128232 states and 791376 transitions. Word has length 33 [2021-07-09 17:27:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:31,443 INFO L482 AbstractCegarLoop]: Abstraction has 128232 states and 791376 transitions. [2021-07-09 17:27:31,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 128232 states and 791376 transitions. [2021-07-09 17:27:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:27:32,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:32,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:32,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:27:32,649 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:27:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1545603378, now seen corresponding path program 10 times [2021-07-09 17:27:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:32,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438711155] [2021-07-09 17:27:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:32,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:32,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438711155] [2021-07-09 17:27:32,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438711155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091921244] [2021-07-09 17:27:32,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:27:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:32,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091921244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:32,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:27:32,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366736254] [2021-07-09 17:27:32,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:27:32,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:32,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:27:32,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:27:32,780 INFO L87 Difference]: Start difference. First operand 128232 states and 791376 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:37,301 INFO L93 Difference]: Finished difference Result 216985 states and 1280323 transitions. [2021-07-09 17:27:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:37,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 33 [2021-07-09 17:27:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:41,017 INFO L225 Difference]: With dead ends: 216985 [2021-07-09 17:27:41,017 INFO L226 Difference]: Without dead ends: 216825 [2021-07-09 17:27:41,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216825 states. [2021-07-09 17:27:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216825 to 128330. [2021-07-09 17:27:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128330 states, 128329 states have (on average 6.170133017478512) internal successors, (791807), 128329 states have internal predecessors, (791807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128330 states to 128330 states and 791807 transitions. [2021-07-09 17:27:51,307 INFO L78 Accepts]: Start accepts. Automaton has 128330 states and 791807 transitions. Word has length 33 [2021-07-09 17:27:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:51,307 INFO L482 AbstractCegarLoop]: Abstraction has 128330 states and 791807 transitions. [2021-07-09 17:27:51,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 128330 states and 791807 transitions. [2021-07-09 17:27:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:27:51,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:51,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:52,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:52,111 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:27:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash -915701574, now seen corresponding path program 11 times [2021-07-09 17:27:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:52,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286503787] [2021-07-09 17:27:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:52,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:52,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286503787] [2021-07-09 17:27:52,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286503787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:52,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168464291] [2021-07-09 17:27:52,156 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:52,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:52,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:27:52,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:52,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168464291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:52,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:52,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:27:52,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174959744] [2021-07-09 17:27:52,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:27:52,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:27:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:27:52,250 INFO L87 Difference]: Start difference. First operand 128330 states and 791807 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-07-09 17:27:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:56,387 INFO L93 Difference]: Finished difference Result 212002 states and 1272275 transitions. [2021-07-09 17:27:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:27:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 33 [2021-07-09 17:27:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:58,831 INFO L225 Difference]: With dead ends: 212002 [2021-07-09 17:27:58,832 INFO L226 Difference]: Without dead ends: 212002 [2021-07-09 17:27:58,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212002 states. [2021-07-09 17:28:07,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212002 to 140596. [2021-07-09 17:28:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140596 states, 140595 states have (on average 6.156221771755752) internal successors, (865534), 140595 states have internal predecessors, (865534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140596 states to 140596 states and 865534 transitions. [2021-07-09 17:28:10,267 INFO L78 Accepts]: Start accepts. Automaton has 140596 states and 865534 transitions. Word has length 33 [2021-07-09 17:28:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:10,268 INFO L482 AbstractCegarLoop]: Abstraction has 140596 states and 865534 transitions. [2021-07-09 17:28:10,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-07-09 17:28:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 140596 states and 865534 transitions. [2021-07-09 17:28:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:28:11,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:11,853 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:12,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:28:12,069 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:28:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash 42418712, now seen corresponding path program 12 times [2021-07-09 17:28:12,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:12,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380037794] [2021-07-09 17:28:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:12,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380037794] [2021-07-09 17:28:12,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380037794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693931783] [2021-07-09 17:28:12,110 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 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 [2021-07-09 17:28:12,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:12,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:28:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693931783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:12,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:12,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:28:12,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541030485] [2021-07-09 17:28:12,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:28:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:12,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:28:12,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:28:12,277 INFO L87 Difference]: Start difference. First operand 140596 states and 865534 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-07-09 17:28:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:18,217 INFO L93 Difference]: Finished difference Result 227249 states and 1340487 transitions. [2021-07-09 17:28:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:28:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 33 [2021-07-09 17:28:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:22,281 INFO L225 Difference]: With dead ends: 227249 [2021-07-09 17:28:22,281 INFO L226 Difference]: Without dead ends: 226769 [2021-07-09 17:28:22,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226769 states. [2021-07-09 17:28:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226769 to 146902. [2021-07-09 17:28:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146902 states, 146901 states have (on average 6.137010639818653) internal successors, (901533), 146901 states have internal predecessors, (901533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146902 states to 146902 states and 901533 transitions. [2021-07-09 17:28:35,240 INFO L78 Accepts]: Start accepts. Automaton has 146902 states and 901533 transitions. Word has length 33 [2021-07-09 17:28:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:35,240 INFO L482 AbstractCegarLoop]: Abstraction has 146902 states and 901533 transitions. [2021-07-09 17:28:35,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-07-09 17:28:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 146902 states and 901533 transitions. [2021-07-09 17:28:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:28:36,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:36,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:37,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:28:37,153 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:28:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1161517172, now seen corresponding path program 3 times [2021-07-09 17:28:37,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:37,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735658022] [2021-07-09 17:28:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:37,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:37,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735658022] [2021-07-09 17:28:37,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735658022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942466027] [2021-07-09 17:28:37,196 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 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 [2021-07-09 17:28:37,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:37,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:28:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:37,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942466027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:37,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:28:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002569391] [2021-07-09 17:28:37,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:28:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:37,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:28:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:28:37,348 INFO L87 Difference]: Start difference. First operand 146902 states and 901533 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:49,870 INFO L93 Difference]: Finished difference Result 514975 states and 3149120 transitions. [2021-07-09 17:28:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:49,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:28:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:01,350 INFO L225 Difference]: With dead ends: 514975 [2021-07-09 17:29:01,350 INFO L226 Difference]: Without dead ends: 514975 [2021-07-09 17:29:01,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514975 states. [2021-07-09 17:29:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514975 to 223496. [2021-07-09 17:29:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223496 states, 223495 states have (on average 6.274547529027495) internal successors, (1402330), 223495 states have internal predecessors, (1402330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223496 states to 223496 states and 1402330 transitions. [2021-07-09 17:29:27,840 INFO L78 Accepts]: Start accepts. Automaton has 223496 states and 1402330 transitions. Word has length 33 [2021-07-09 17:29:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:27,840 INFO L482 AbstractCegarLoop]: Abstraction has 223496 states and 1402330 transitions. [2021-07-09 17:29:27,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 223496 states and 1402330 transitions. [2021-07-09 17:29:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:29:30,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:30,446 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:30,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:29:30,661 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-09 17:29:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:30,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1985612620, now seen corresponding path program 4 times [2021-07-09 17:29:30,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:30,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376516664] [2021-07-09 17:29:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:30,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376516664] [2021-07-09 17:29:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376516664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687529986] [2021-07-09 17:29:30,705 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 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 [2021-07-09 17:29:30,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:30,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:29:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687529986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:30,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:29:30,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476632853] [2021-07-09 17:29:30,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:29:30,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:30,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:29:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:29:30,875 INFO L87 Difference]: Start difference. First operand 223496 states and 1402330 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)