/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-correct08.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-1c3aa5735269c4be989a50fc1da9ea7b9492ef29-1c3aa57 [2021-07-01 10:04:07,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-01 10:04:07,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-01 10:04:07,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-01 10:04:07,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-01 10:04:07,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-01 10:04:07,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-01 10:04:07,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-01 10:04:07,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-01 10:04:07,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-01 10:04:07,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-01 10:04:07,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-01 10:04:07,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-01 10:04:07,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-01 10:04:07,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-01 10:04:07,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-01 10:04:07,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-01 10:04:07,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-01 10:04:07,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-01 10:04:07,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-01 10:04:07,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-01 10:04:07,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-01 10:04:07,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-01 10:04:07,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-01 10:04:07,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-01 10:04:07,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-07-01 10:04:07,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-01 10:04:07,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-01 10:04:07,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * Use SBE=true [2021-07-01 10:04:07,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-01 10:04:07,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-01 10:04:07,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-01 10:04:07,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 10:04:07,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-01 10:04:07,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-01 10:04:07,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-01 10:04:07,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-01 10:04:07,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-01 10:04:07,858 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-01 10:04:07,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-01 10:04:07,858 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-07-01 10:04:07,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-01 10:04:08,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-01 10:04:08,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-01 10:04:08,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-01 10:04:08,130 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-01 10:04:08,132 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-01 10:04:08,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-correct08.bpl [2021-07-01 10:04:08,133 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-correct08.bpl' [2021-07-01 10:04:08,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-01 10:04:08,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-01 10:04:08,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-01 10:04:08,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-01 10:04:08,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-01 10:04:08,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-01 10:04:08,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-01 10:04:08,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-01 10:04:08,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-01 10:04:08,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/1) ... [2021-07-01 10:04:08,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-01 10:04:08,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-01 10:04:08,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-01 10:04:08,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-01 10:04:08,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (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 [2021-07-01 10:04:08,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThreadWithAssert given in one single declaration [2021-07-01 10:04:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThreadWithAssert [2021-07-01 10:04:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThreadWithAssert [2021-07-01 10:04:08,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-07-01 10:04:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-07-01 10:04:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-07-01 10:04:08,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-07-01 10:04:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-07-01 10:04:08,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-07-01 10:04:08,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-01 10:04:08,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-01 10:04:08,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-01 10:04:08,278 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-01 10:04:08,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-01 10:04:08,505 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-07-01 10:04:08,505 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadWithAssertEXIT is neither atomic block end nor error location. [2021-07-01 10:04:08,506 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-07-01 10:04:08,507 INFO L202 PluginConnector]: Adding new model bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 10:04:08 BoogieIcfgContainer [2021-07-01 10:04:08,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-01 10:04:08,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-01 10:04:08,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-01 10:04:08,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-01 10:04:08,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:08" (1/2) ... [2021-07-01 10:04:08,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625fceec and model type bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 10:04:08, skipping insertion in model container [2021-07-01 10:04:08,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-correct08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 10:04:08" (2/2) ... [2021-07-01 10:04:08,512 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-correct08.bpl [2021-07-01 10:04:08,515 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-01 10:04:08,516 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-01 10:04:08,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-01 10:04:08,516 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-01 10:04:08,546 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-01 10:04:08,561 INFO L255 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-07-01 10:04:08,575 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 10:04:08,575 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 10:04:08,575 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 10:04:08,575 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 10:04:08,576 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 10:04:08,576 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 10:04:08,576 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 10:04:08,576 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-01 10:04:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 32801 states, 27335 states have (on average 3.2734589354307664) internal successors, (89480), 32800 states have internal predecessors, (89480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:04:16,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-01 10:04:16,890 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/2) [2021-07-01 10:04:16,891 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-01 10:04:16,900 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 10:04:16,900 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 10:04:16,900 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 10:04:16,900 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 10:04:16,900 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 10:04:16,900 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 10:04:16,900 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 10:04:16,900 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadWithAssertThread1of1ForFork1======== [2021-07-01 10:07:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 131219 states, 131211 states have (on average 8.828147030355687) internal successors, (1158350), 131218 states have internal predecessors, (1158350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:07:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-07-01 10:07:38,572 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 10:07:38,573 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 10:07:38,573 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 10:07:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 10:07:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1804539990, now seen corresponding path program 1 times [2021-07-01 10:07:38,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 10:07:38,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296183253] [2021-07-01 10:07:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 10:07:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 10:07:38,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:38,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:07:38,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:38,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-07-01 10:07:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 10:07:38,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 10:07:38,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296183253] [2021-07-01 10:07:38,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296183253] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 10:07:38,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 10:07:38,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-01 10:07:38,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924395447] [2021-07-01 10:07:38,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 10:07:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 10:07:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 10:07:38,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 10:07:39,045 INFO L87 Difference]: Start difference. First operand has 131219 states, 131211 states have (on average 8.828147030355687) internal successors, (1158350), 131218 states have internal predecessors, (1158350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:07:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 10:07:42,998 INFO L93 Difference]: Finished difference Result 142153 states and 1240210 transitions. [2021-07-01 10:07:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 10:07:42,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-07-01 10:07:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 10:07:44,635 INFO L225 Difference]: With dead ends: 142153 [2021-07-01 10:07:44,635 INFO L226 Difference]: Without dead ends: 109337 [2021-07-01 10:07:44,636 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 10:07:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109337 states. [2021-07-01 10:07:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109337 to 109337. [2021-07-01 10:07:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109337 states, 109335 states have (on average 8.69426075822015) internal successors, (950587), 109336 states have internal predecessors, (950587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:07:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109337 states to 109337 states and 950587 transitions. [2021-07-01 10:07:56,205 INFO L78 Accepts]: Start accepts. Automaton has 109337 states and 950587 transitions. Word has length 8 [2021-07-01 10:07:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 10:07:56,206 INFO L482 AbstractCegarLoop]: Abstraction has 109337 states and 950587 transitions. [2021-07-01 10:07:56,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:07:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 109337 states and 950587 transitions. [2021-07-01 10:07:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-01 10:07:56,207 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 10:07:56,208 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 10:07:56,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-01 10:07:56,208 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 10:07:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 10:07:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1634833880, now seen corresponding path program 1 times [2021-07-01 10:07:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 10:07:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956221022] [2021-07-01 10:07:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 10:07:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 10:07:56,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:56,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 10:07:56,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:56,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:07:56,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:56,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:07:56,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:56,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-07-01 10:07:56,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:56,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:07:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 10:07:56,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 10:07:56,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956221022] [2021-07-01 10:07:56,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956221022] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 10:07:56,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 10:07:56,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-01 10:07:56,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742365572] [2021-07-01 10:07:56,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-01 10:07:56,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 10:07:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-01 10:07:56,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-01 10:07:56,251 INFO L87 Difference]: Start difference. First operand 109337 states and 950587 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 10:08:00,297 INFO L93 Difference]: Finished difference Result 204186 states and 1774212 transitions. [2021-07-01 10:08:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-01 10:08:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-01 10:08:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 10:08:03,557 INFO L225 Difference]: With dead ends: 204186 [2021-07-01 10:08:03,557 INFO L226 Difference]: Without dead ends: 204186 [2021-07-01 10:08:03,558 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-01 10:08:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204186 states. [2021-07-01 10:08:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204186 to 203160. [2021-07-01 10:08:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203160 states, 203158 states have (on average 8.70578564467065) internal successors, (1768650), 203159 states have internal predecessors, (1768650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203160 states to 203160 states and 1768650 transitions. [2021-07-01 10:08:22,379 INFO L78 Accepts]: Start accepts. Automaton has 203160 states and 1768650 transitions. Word has length 12 [2021-07-01 10:08:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 10:08:22,379 INFO L482 AbstractCegarLoop]: Abstraction has 203160 states and 1768650 transitions. [2021-07-01 10:08:22,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 203160 states and 1768650 transitions. [2021-07-01 10:08:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-01 10:08:22,381 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 10:08:22,381 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 10:08:22,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-01 10:08:22,381 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 10:08:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 10:08:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash -918956150, now seen corresponding path program 2 times [2021-07-01 10:08:22,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 10:08:22,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405716502] [2021-07-01 10:08:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 10:08:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 10:08:22,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:22,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:22,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:22,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:22,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:22,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 10:08:22,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 10:08:22,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405716502] [2021-07-01 10:08:22,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405716502] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 10:08:22,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 10:08:22,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-01 10:08:22,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12706371] [2021-07-01 10:08:22,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 10:08:22,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 10:08:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 10:08:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 10:08:22,397 INFO L87 Difference]: Start difference. First operand 203160 states and 1768650 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 10:08:25,754 INFO L93 Difference]: Finished difference Result 189115 states and 1298270 transitions. [2021-07-01 10:08:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 10:08:25,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-01 10:08:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 10:08:26,993 INFO L225 Difference]: With dead ends: 189115 [2021-07-01 10:08:26,993 INFO L226 Difference]: Without dead ends: 101919 [2021-07-01 10:08:26,994 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 10:08:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101919 states. [2021-07-01 10:08:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101919 to 96715. [2021-07-01 10:08:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96715 states, 96713 states have (on average 7.013876107658743) internal successors, (678333), 96714 states have internal predecessors, (678333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96715 states to 96715 states and 678333 transitions. [2021-07-01 10:08:34,845 INFO L78 Accepts]: Start accepts. Automaton has 96715 states and 678333 transitions. Word has length 12 [2021-07-01 10:08:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 10:08:34,845 INFO L482 AbstractCegarLoop]: Abstraction has 96715 states and 678333 transitions. [2021-07-01 10:08:34,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 96715 states and 678333 transitions. [2021-07-01 10:08:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-01 10:08:34,852 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 10:08:34,852 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 10:08:34,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-01 10:08:34,852 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 10:08:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 10:08:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash 637522358, now seen corresponding path program 1 times [2021-07-01 10:08:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 10:08:34,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551446194] [2021-07-01 10:08:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 10:08:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 10:08:34,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:34,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 10:08:34,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:34,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:34,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:34,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:34,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:34,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:34,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:34,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:34,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:34,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-07-01 10:08:34,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:34,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 10:08:34,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 10:08:34,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551446194] [2021-07-01 10:08:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551446194] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 10:08:34,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 10:08:34,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-01 10:08:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079378930] [2021-07-01 10:08:34,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-01 10:08:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 10:08:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-01 10:08:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-07-01 10:08:34,919 INFO L87 Difference]: Start difference. First operand 96715 states and 678333 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 10:08:37,540 INFO L93 Difference]: Finished difference Result 169420 states and 1207266 transitions. [2021-07-01 10:08:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-01 10:08:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-01 10:08:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 10:08:38,847 INFO L225 Difference]: With dead ends: 169420 [2021-07-01 10:08:38,848 INFO L226 Difference]: Without dead ends: 163568 [2021-07-01 10:08:38,848 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-07-01 10:08:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163568 states. [2021-07-01 10:08:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163568 to 118215. [2021-07-01 10:08:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118215 states, 118213 states have (on average 7.069620092544813) internal successors, (835721), 118214 states have internal predecessors, (835721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118215 states to 118215 states and 835721 transitions. [2021-07-01 10:08:47,931 INFO L78 Accepts]: Start accepts. Automaton has 118215 states and 835721 transitions. Word has length 15 [2021-07-01 10:08:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 10:08:47,932 INFO L482 AbstractCegarLoop]: Abstraction has 118215 states and 835721 transitions. [2021-07-01 10:08:47,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 118215 states and 835721 transitions. [2021-07-01 10:08:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-01 10:08:47,983 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 10:08:47,983 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 10:08:47,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-01 10:08:47,984 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 10:08:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 10:08:47,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1807692322, now seen corresponding path program 1 times [2021-07-01 10:08:47,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 10:08:47,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672368928] [2021-07-01 10:08:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 10:08:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 10:08:48,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 10:08:48,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:48,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:48,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:48,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:48,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:48,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-07-01 10:08:48,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-07-01 10:08:48,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:48,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 10:08:48,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 10:08:48,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672368928] [2021-07-01 10:08:48,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672368928] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 10:08:48,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 10:08:48,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-01 10:08:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452737494] [2021-07-01 10:08:48,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-01 10:08:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 10:08:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-01 10:08:48,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-07-01 10:08:48,061 INFO L87 Difference]: Start difference. First operand 118215 states and 835721 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)