/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98196c323137eee61a7c1131837b356358d783d4-98196c3 [2021-06-16 16:33:30,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-16 16:33:30,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-16 16:33:30,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-16 16:33:30,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-16 16:33:30,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-16 16:33:30,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-16 16:33:30,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-16 16:33:30,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-16 16:33:30,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-16 16:33:30,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-16 16:33:30,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-16 16:33:30,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-16 16:33:30,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-16 16:33:30,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-16 16:33:30,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-16 16:33:30,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-16 16:33:30,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-06-16 16:33:30,271 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-16 16:33:30,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-16 16:33:30,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-16 16:33:30,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-16 16:33:30,272 INFO L138 SettingsManager]: * Use SBE=true [2021-06-16 16:33:30,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-16 16:33:30,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-16 16:33:30,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-16 16:33:30,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-16 16:33:30,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-16 16:33:30,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-16 16:33:30,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-16 16:33:30,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-16 16:33:30,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-16 16:33:30,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-16 16:33:30,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-16 16:33:30,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-16 16:33:30,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-16 16:33:30,507 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-16 16:33:30,508 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-16 16:33:30,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl [2021-06-16 16:33:30,513 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl' [2021-06-16 16:33:30,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-16 16:33:30,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-16 16:33:30,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-16 16:33:30,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-16 16:33:30,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-16 16:33:30,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-16 16:33:30,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-16 16:33:30,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-16 16:33:30,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-16 16:33:30,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... [2021-06-16 16:33:30,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-16 16:33:30,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-16 16:33:30,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-16 16:33:30,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-16 16:33:30,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-16 16:33:30,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-06-16 16:33:30,620 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-06-16 16:33:30,620 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-06-16 16:33:30,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-16 16:33:30,620 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-16 16:33:30,621 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-16 16:33:30,621 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-16 16:33:30,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-16 16:33:30,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-16 16:33:30,621 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-16 16:33:30,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-16 16:33:30,764 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-16 16:33:30,765 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:33:30 BoogieIcfgContainer [2021-06-16 16:33:30,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-16 16:33:30,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-16 16:33:30,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-16 16:33:30,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-16 16:33:30,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:33:30" (1/2) ... [2021-06-16 16:33:30,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1666620b and model type Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.06 04:33:30, skipping insertion in model container [2021-06-16 16:33:30,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:33:30" (2/2) ... [2021-06-16 16:33:30,782 INFO L111 eAbstractionObserver]: Analyzing ICFG Bakery.bpl [2021-06-16 16:33:30,786 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-16 16:33:30,787 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-16 16:33:30,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-16 16:33:30,788 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-16 16:33:30,835 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-16 16:33:30,850 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:30,863 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:30,863 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:30,863 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:30,863 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:30,863 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:30,863 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:30,863 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:30,863 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process0======== [2021-06-16 16:33:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.9281045751633987) internal successors, (295), 174 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:30,993 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:30,994 INFO L301 ceAbstractionStarter]: Result for error location Process0 was SAFE (1/5) [2021-06-16 16:33:30,995 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:31,009 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:31,009 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:31,009 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:31,009 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:31,009 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:31,010 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:31,010 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:31,010 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1======== [2021-06-16 16:33:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.9281045751633987) internal successors, (295), 174 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,086 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:31,086 INFO L301 ceAbstractionStarter]: Result for error location Process1 was SAFE (2/5) [2021-06-16 16:33:31,086 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-16 16:33:31,088 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:31,088 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:31,094 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:31,094 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:31,094 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:31,094 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:31,094 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:31,094 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-16 16:33:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.9281045751633987) internal successors, (295), 174 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,144 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:31,144 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (3/5) [2021-06-16 16:33:31,145 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:31,146 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:31,146 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:31,147 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:31,147 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:31,147 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:31,147 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:31,147 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:31,147 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1Thread1of1ForFork1======== [2021-06-16 16:33:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.9281045751633987) internal successors, (295), 174 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-16 16:33:31,201 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,202 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,202 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,206 INFO L82 PathProgramCache]: Analyzing trace with hash 281769241, now seen corresponding path program 1 times [2021-06-16 16:33:31,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079736096] [2021-06-16 16:33:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:31,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:31,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:31,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079736096] [2021-06-16 16:33:31,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079736096] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:31,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:31,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-16 16:33:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272814199] [2021-06-16 16:33:31,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:31,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:31,299 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.9281045751633987) internal successors, (295), 174 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:31,321 INFO L93 Difference]: Finished difference Result 126 states and 217 transitions. [2021-06-16 16:33:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-16 16:33:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:31,330 INFO L225 Difference]: With dead ends: 126 [2021-06-16 16:33:31,331 INFO L226 Difference]: Without dead ends: 114 [2021-06-16 16:33:31,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-16 16:33:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2021-06-16 16:33:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 102 states have (on average 1.7450980392156863) internal successors, (178), 101 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 178 transitions. [2021-06-16 16:33:31,361 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 178 transitions. Word has length 8 [2021-06-16 16:33:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:31,361 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 178 transitions. [2021-06-16 16:33:31,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 178 transitions. [2021-06-16 16:33:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:31,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,362 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-16 16:33:31,362 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash 603248314, now seen corresponding path program 1 times [2021-06-16 16:33:31,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443546826] [2021-06-16 16:33:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:31,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:31,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:31,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:31,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443546826] [2021-06-16 16:33:31,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443546826] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:31,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:31,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:31,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159623688] [2021-06-16 16:33:31,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:31,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:31,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:31,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:31,393 INFO L87 Difference]: Start difference. First operand 102 states and 178 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:31,436 INFO L93 Difference]: Finished difference Result 182 states and 306 transitions. [2021-06-16 16:33:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-16 16:33:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:31,438 INFO L225 Difference]: With dead ends: 182 [2021-06-16 16:33:31,439 INFO L226 Difference]: Without dead ends: 182 [2021-06-16 16:33:31,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-16 16:33:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-06-16 16:33:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.7) internal successors, (306), 181 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 306 transitions. [2021-06-16 16:33:31,462 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 306 transitions. Word has length 12 [2021-06-16 16:33:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:31,463 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 306 transitions. [2021-06-16 16:33:31,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 306 transitions. [2021-06-16 16:33:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:31,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,464 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-16 16:33:31,464 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash 382886100, now seen corresponding path program 2 times [2021-06-16 16:33:31,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113109908] [2021-06-16 16:33:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:31,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,497 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:31,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:31,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:31,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113109908] [2021-06-16 16:33:31,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113109908] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:31,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:31,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-16 16:33:31,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041967864] [2021-06-16 16:33:31,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-16 16:33:31,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-16 16:33:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:31,513 INFO L87 Difference]: Start difference. First operand 182 states and 306 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:31,569 INFO L93 Difference]: Finished difference Result 202 states and 339 transitions. [2021-06-16 16:33:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-16 16:33:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2021-06-16 16:33:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:31,590 INFO L225 Difference]: With dead ends: 202 [2021-06-16 16:33:31,590 INFO L226 Difference]: Without dead ends: 202 [2021-06-16 16:33:31,590 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-16 16:33:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-06-16 16:33:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 196 states have (on average 1.6785714285714286) internal successors, (329), 195 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 329 transitions. [2021-06-16 16:33:31,599 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 329 transitions. Word has length 12 [2021-06-16 16:33:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:31,599 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 329 transitions. [2021-06-16 16:33:31,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 329 transitions. [2021-06-16 16:33:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:31,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,600 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-16 16:33:31,600 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash 304392828, now seen corresponding path program 3 times [2021-06-16 16:33:31,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022443827] [2021-06-16 16:33:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:31,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:31,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:31,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:31,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022443827] [2021-06-16 16:33:31,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022443827] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:31,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:31,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-16 16:33:31,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124588030] [2021-06-16 16:33:31,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-16 16:33:31,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-16 16:33:31,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:31,627 INFO L87 Difference]: Start difference. First operand 196 states and 329 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:31,665 INFO L93 Difference]: Finished difference Result 268 states and 434 transitions. [2021-06-16 16:33:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-16 16:33:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2021-06-16 16:33:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:31,670 INFO L225 Difference]: With dead ends: 268 [2021-06-16 16:33:31,671 INFO L226 Difference]: Without dead ends: 268 [2021-06-16 16:33:31,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-16 16:33:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-06-16 16:33:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 236 states have (on average 1.6779661016949152) internal successors, (396), 237 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2021-06-16 16:33:31,681 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 12 [2021-06-16 16:33:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:31,681 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2021-06-16 16:33:31,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:31,682 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2021-06-16 16:33:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-16 16:33:31,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,682 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-16 16:33:31,682 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,683 INFO L82 PathProgramCache]: Analyzing trace with hash 143261844, now seen corresponding path program 1 times [2021-06-16 16:33:31,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125648308] [2021-06-16 16:33:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:31,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,720 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:31,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:31,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:31,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125648308] [2021-06-16 16:33:31,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125648308] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:31,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:31,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:31,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396779411] [2021-06-16 16:33:31,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:31,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:31,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:31,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:31,733 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-16 16:33:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:31,782 INFO L93 Difference]: Finished difference Result 182 states and 294 transitions. [2021-06-16 16:33:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) Word has length 18 [2021-06-16 16:33:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:31,783 INFO L225 Difference]: With dead ends: 182 [2021-06-16 16:33:31,783 INFO L226 Difference]: Without dead ends: 182 [2021-06-16 16:33:31,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-16 16:33:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-16 16:33:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2021-06-16 16:33:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 142 states have (on average 1.6549295774647887) internal successors, (235), 141 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 235 transitions. [2021-06-16 16:33:31,789 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 235 transitions. Word has length 18 [2021-06-16 16:33:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:31,789 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 235 transitions. [2021-06-16 16:33:31,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-16 16:33:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 235 transitions. [2021-06-16 16:33:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-16 16:33:31,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,790 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-16 16:33:31,790 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,791 INFO L82 PathProgramCache]: Analyzing trace with hash 828911154, now seen corresponding path program 2 times [2021-06-16 16:33:31,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561939176] [2021-06-16 16:33:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:31,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:31,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:31,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:31,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561939176] [2021-06-16 16:33:31,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561939176] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:31,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:31,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-16 16:33:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539360988] [2021-06-16 16:33:31,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-16 16:33:31,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-16 16:33:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:31,851 INFO L87 Difference]: Start difference. First operand 142 states and 235 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-06-16 16:33:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:31,873 INFO L93 Difference]: Finished difference Result 190 states and 300 transitions. [2021-06-16 16:33:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-16 16:33:31,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) Word has length 18 [2021-06-16 16:33:31,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:31,874 INFO L225 Difference]: With dead ends: 190 [2021-06-16 16:33:31,874 INFO L226 Difference]: Without dead ends: 190 [2021-06-16 16:33:31,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-16 16:33:31,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 144. [2021-06-16 16:33:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 144 states have (on average 1.6041666666666667) internal successors, (231), 143 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 231 transitions. [2021-06-16 16:33:31,879 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 231 transitions. Word has length 18 [2021-06-16 16:33:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:31,880 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 231 transitions. [2021-06-16 16:33:31,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-06-16 16:33:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 231 transitions. [2021-06-16 16:33:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-16 16:33:31,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,880 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-16 16:33:31,880 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1785630286, now seen corresponding path program 1 times [2021-06-16 16:33:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140957846] [2021-06-16 16:33:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:31,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:31,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:31,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:31,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:31,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:31,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140957846] [2021-06-16 16:33:31,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140957846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:31,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:31,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:31,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890488057] [2021-06-16 16:33:31,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:31,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:31,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:31,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:31,914 INFO L87 Difference]: Start difference. First operand 144 states and 231 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:31,948 INFO L93 Difference]: Finished difference Result 132 states and 196 transitions. [2021-06-16 16:33:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-16 16:33:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:31,949 INFO L225 Difference]: With dead ends: 132 [2021-06-16 16:33:31,949 INFO L226 Difference]: Without dead ends: 0 [2021-06-16 16:33:31,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-16 16:33:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-16 16:33:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-16 16:33:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-16 16:33:31,953 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-16 16:33:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:31,953 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-16 16:33:31,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-16 16:33:31,953 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:31,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-16 16:33:31,954 INFO L301 ceAbstractionStarter]: Result for error location Process1Thread1of1ForFork1 was SAFE (4/5) [2021-06-16 16:33:31,954 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-16 16:33:31,958 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:33:31,959 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:33:31,959 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:33:31,959 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:33:31,959 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:33:31,959 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:33:31,959 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:33:31,959 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process0Thread1of1ForFork0======== [2021-06-16 16:33:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.9281045751633987) internal successors, (295), 174 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-16 16:33:31,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:31,997 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:31,997 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:31,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1948731573, now seen corresponding path program 1 times [2021-06-16 16:33:31,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:31,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856217312] [2021-06-16 16:33:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:32,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:32,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:32,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:32,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856217312] [2021-06-16 16:33:32,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856217312] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:32,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:32,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-16 16:33:32,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360613446] [2021-06-16 16:33:32,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-16 16:33:32,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-16 16:33:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:32,031 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.9281045751633987) internal successors, (295), 174 states have internal predecessors, (295), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:32,045 INFO L93 Difference]: Finished difference Result 204 states and 365 transitions. [2021-06-16 16:33:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-16 16:33:32,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-06-16 16:33:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:32,047 INFO L225 Difference]: With dead ends: 204 [2021-06-16 16:33:32,047 INFO L226 Difference]: Without dead ends: 194 [2021-06-16 16:33:32,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-16 16:33:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-16 16:33:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2021-06-16 16:33:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.85) internal successors, (333), 181 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 333 transitions. [2021-06-16 16:33:32,064 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 333 transitions. Word has length 7 [2021-06-16 16:33:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:32,064 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 333 transitions. [2021-06-16 16:33:32,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 333 transitions. [2021-06-16 16:33:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-16 16:33:32,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:32,066 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:32,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-16 16:33:32,066 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash 125873225, now seen corresponding path program 1 times [2021-06-16 16:33:32,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:32,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156464052] [2021-06-16 16:33:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:32,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:32,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156464052] [2021-06-16 16:33:32,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156464052] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:32,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:32,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-16 16:33:32,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368219526] [2021-06-16 16:33:32,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:33:32,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:33:32,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:32,093 INFO L87 Difference]: Start difference. First operand 182 states and 333 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:32,106 INFO L93 Difference]: Finished difference Result 208 states and 357 transitions. [2021-06-16 16:33:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:33:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-16 16:33:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:32,107 INFO L225 Difference]: With dead ends: 208 [2021-06-16 16:33:32,107 INFO L226 Difference]: Without dead ends: 196 [2021-06-16 16:33:32,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:33:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-16 16:33:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2021-06-16 16:33:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 172 states have (on average 1.7383720930232558) internal successors, (299), 171 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 299 transitions. [2021-06-16 16:33:32,111 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 299 transitions. Word has length 9 [2021-06-16 16:33:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:32,111 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 299 transitions. [2021-06-16 16:33:32,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 299 transitions. [2021-06-16 16:33:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:32,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:32,112 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:32,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-16 16:33:32,112 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:32,112 INFO L82 PathProgramCache]: Analyzing trace with hash 391474269, now seen corresponding path program 1 times [2021-06-16 16:33:32,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:32,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654976624] [2021-06-16 16:33:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:32,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:32,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:32,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:32,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654976624] [2021-06-16 16:33:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654976624] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:32,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:32,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-16 16:33:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508737312] [2021-06-16 16:33:32,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-16 16:33:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-16 16:33:32,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:32,138 INFO L87 Difference]: Start difference. First operand 172 states and 299 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:32,160 INFO L93 Difference]: Finished difference Result 212 states and 357 transitions. [2021-06-16 16:33:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-16 16:33:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2021-06-16 16:33:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:32,161 INFO L225 Difference]: With dead ends: 212 [2021-06-16 16:33:32,161 INFO L226 Difference]: Without dead ends: 212 [2021-06-16 16:33:32,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-16 16:33:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-06-16 16:33:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.7) internal successors, (357), 211 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 357 transitions. [2021-06-16 16:33:32,165 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 357 transitions. Word has length 12 [2021-06-16 16:33:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:32,165 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 357 transitions. [2021-06-16 16:33:32,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 357 transitions. [2021-06-16 16:33:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-16 16:33:32,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:32,166 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:32,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-16 16:33:32,166 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash 630687597, now seen corresponding path program 2 times [2021-06-16 16:33:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:32,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539245095] [2021-06-16 16:33:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:32,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,181 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:32,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:32,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:32,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539245095] [2021-06-16 16:33:32,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539245095] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:32,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:32,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-16 16:33:32,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647167388] [2021-06-16 16:33:32,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-16 16:33:32,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-16 16:33:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:32,195 INFO L87 Difference]: Start difference. First operand 212 states and 357 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:32,224 INFO L93 Difference]: Finished difference Result 270 states and 440 transitions. [2021-06-16 16:33:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-16 16:33:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2021-06-16 16:33:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:32,225 INFO L225 Difference]: With dead ends: 270 [2021-06-16 16:33:32,225 INFO L226 Difference]: Without dead ends: 270 [2021-06-16 16:33:32,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-16 16:33:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 222. [2021-06-16 16:33:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 222 states have (on average 1.7072072072072073) internal successors, (379), 221 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 379 transitions. [2021-06-16 16:33:32,229 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 379 transitions. Word has length 12 [2021-06-16 16:33:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:32,229 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 379 transitions. [2021-06-16 16:33:32,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) 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) [2021-06-16 16:33:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 379 transitions. [2021-06-16 16:33:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-16 16:33:32,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:32,230 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:32,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-16 16:33:32,230 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash 147109803, now seen corresponding path program 1 times [2021-06-16 16:33:32,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:32,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841347413] [2021-06-16 16:33:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:32,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:32,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:32,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:32,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841347413] [2021-06-16 16:33:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841347413] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:32,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:32,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:32,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824321583] [2021-06-16 16:33:32,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:32,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:32,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:32,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:32,259 INFO L87 Difference]: Start difference. First operand 222 states and 379 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-16 16:33:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:32,290 INFO L93 Difference]: Finished difference Result 182 states and 297 transitions. [2021-06-16 16:33:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) Word has length 18 [2021-06-16 16:33:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:32,291 INFO L225 Difference]: With dead ends: 182 [2021-06-16 16:33:32,291 INFO L226 Difference]: Without dead ends: 182 [2021-06-16 16:33:32,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-16 16:33:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-16 16:33:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2021-06-16 16:33:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 142 states have (on average 1.676056338028169) internal successors, (238), 141 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 238 transitions. [2021-06-16 16:33:32,295 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 238 transitions. Word has length 18 [2021-06-16 16:33:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:32,295 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 238 transitions. [2021-06-16 16:33:32,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-16 16:33:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 238 transitions. [2021-06-16 16:33:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-16 16:33:32,295 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:32,295 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:32,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-16 16:33:32,295 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:32,296 INFO L82 PathProgramCache]: Analyzing trace with hash 832759113, now seen corresponding path program 2 times [2021-06-16 16:33:32,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:32,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931836798] [2021-06-16 16:33:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:32,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:32,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:32,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:32,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931836798] [2021-06-16 16:33:32,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931836798] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:32,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:32,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-16 16:33:32,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853403474] [2021-06-16 16:33:32,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-16 16:33:32,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:32,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-16 16:33:32,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-16 16:33:32,338 INFO L87 Difference]: Start difference. First operand 142 states and 238 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-06-16 16:33:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:32,373 INFO L93 Difference]: Finished difference Result 188 states and 301 transitions. [2021-06-16 16:33:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-16 16:33:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) Word has length 18 [2021-06-16 16:33:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:32,374 INFO L225 Difference]: With dead ends: 188 [2021-06-16 16:33:32,374 INFO L226 Difference]: Without dead ends: 188 [2021-06-16 16:33:32,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-16 16:33:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 148. [2021-06-16 16:33:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.6575342465753424) internal successors, (242), 147 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 242 transitions. [2021-06-16 16:33:32,378 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 242 transitions. Word has length 18 [2021-06-16 16:33:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:32,378 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 242 transitions. [2021-06-16 16:33:32,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-06-16 16:33:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 242 transitions. [2021-06-16 16:33:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-16 16:33:32,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:33:32,378 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:33:32,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-16 16:33:32,379 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:33:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:33:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1459335517, now seen corresponding path program 1 times [2021-06-16 16:33:32,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:33:32,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025521950] [2021-06-16 16:33:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:33:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:33:32,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:33:32,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-16 16:33:32,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:33:32,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:33:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:33:32,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:33:32,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025521950] [2021-06-16 16:33:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025521950] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:33:32,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:33:32,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-16 16:33:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085258983] [2021-06-16 16:33:32,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-16 16:33:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:33:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-16 16:33:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-16 16:33:32,439 INFO L87 Difference]: Start difference. First operand 148 states and 242 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:33:32,468 INFO L93 Difference]: Finished difference Result 132 states and 196 transitions. [2021-06-16 16:33:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-16 16:33:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-16 16:33:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:33:32,469 INFO L225 Difference]: With dead ends: 132 [2021-06-16 16:33:32,469 INFO L226 Difference]: Without dead ends: 0 [2021-06-16 16:33:32,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-16 16:33:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-16 16:33:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-16 16:33:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-16 16:33:32,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-16 16:33:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:33:32,470 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-16 16:33:32,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-16 16:33:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-16 16:33:32,470 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-16 16:33:32,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-16 16:33:32,470 INFO L301 ceAbstractionStarter]: Result for error location Process0Thread1of1ForFork0 was SAFE (5/5) [2021-06-16 16:33:32,470 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-16 16:33:32,473 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.06 04:33:32 BasicIcfg [2021-06-16 16:33:32,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-16 16:33:32,474 INFO L168 Benchmark]: Toolchain (without parser) took 1939.21 ms. Allocated memory was 180.4 MB in the beginning and 272.6 MB in the end (delta: 92.3 MB). Free memory was 160.1 MB in the beginning and 237.3 MB in the end (delta: -77.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:32,474 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 160.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-16 16:33:32,475 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.33 ms. Allocated memory is still 180.4 MB. Free memory was 159.7 MB in the beginning and 158.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:32,476 INFO L168 Benchmark]: Boogie Preprocessor took 10.46 ms. Allocated memory is still 180.4 MB. Free memory was 158.4 MB in the beginning and 157.6 MB in the end (delta: 830.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:32,476 INFO L168 Benchmark]: RCFGBuilder took 196.59 ms. Allocated memory is still 180.4 MB. Free memory was 157.4 MB in the beginning and 146.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:32,477 INFO L168 Benchmark]: TraceAbstraction took 1704.61 ms. Allocated memory was 180.4 MB in the beginning and 272.6 MB in the end (delta: 92.3 MB). Free memory was 146.0 MB in the beginning and 237.3 MB in the end (delta: -91.3 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2021-06-16 16:33:32,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 160.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.33 ms. Allocated memory is still 180.4 MB. Free memory was 159.7 MB in the beginning and 158.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.46 ms. Allocated memory is still 180.4 MB. Free memory was 158.4 MB in the beginning and 157.6 MB in the end (delta: 830.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 196.59 ms. Allocated memory is still 180.4 MB. Free memory was 157.4 MB in the beginning and 146.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1704.61 ms. Allocated memory was 180.4 MB in the beginning and 272.6 MB in the end (delta: 92.3 MB). Free memory was 146.0 MB in the beginning and 237.3 MB in the end (delta: -91.3 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 367, positive: 283, positive conditional: 283, positive unconditional: 0, negative: 84, negative conditional: 84, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 305, positive: 283, positive conditional: 0, positive unconditional: 283, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 110, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 110, positive: 91, positive conditional: 0, positive unconditional: 91, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 60, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 305, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 110, unknown conditional: 0, unknown unconditional: 110] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Independence queries for same thread: 62 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 367, positive: 283, positive conditional: 283, positive unconditional: 0, negative: 84, negative conditional: 84, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 305, positive: 283, positive conditional: 0, positive unconditional: 283, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 110, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 110, positive: 91, positive conditional: 0, positive unconditional: 91, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 48, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 305, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 110, unknown conditional: 0, unknown unconditional: 110] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Independence queries for same thread: 62 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 367, positive: 283, positive conditional: 283, positive unconditional: 0, negative: 84, negative conditional: 84, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 305, positive: 283, positive conditional: 0, positive unconditional: 283, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 110, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 110, positive: 91, positive conditional: 0, positive unconditional: 91, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 19, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 305, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 110, unknown conditional: 0, unknown unconditional: 110] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Independence queries for same thread: 62 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 367, positive: 283, positive conditional: 283, positive unconditional: 0, negative: 84, negative conditional: 84, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 305, positive: 283, positive conditional: 0, positive unconditional: 283, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 110, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 110, positive: 91, positive conditional: 0, positive unconditional: 91, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 34, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 305, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 110, unknown conditional: 0, unknown unconditional: 110] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Independence queries for same thread: 62 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 367, positive: 283, positive conditional: 283, positive unconditional: 0, negative: 84, negative conditional: 84, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 305, positive: 283, positive conditional: 0, positive unconditional: 283, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 110, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 110, positive: 91, positive conditional: 0, positive unconditional: 91, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 305, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 110, unknown conditional: 0, unknown unconditional: 110] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Independence queries for same thread: 62 - PositiveResult [Line: 38]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 53]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process0 with 1 thread instances CFG has 5 procedures, 45 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 132.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 8.1ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 121.5ms, PartialOrderReductionTime: 114.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1 with 1 thread instances CFG has 5 procedures, 45 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 77.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.1ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 72.9ms, PartialOrderReductionTime: 71.8ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 45 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 56.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 47.3ms, PartialOrderReductionTime: 44.7ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 45 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 807.2ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 4.4ms, AutomataDifference: 320.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 52.7ms, PartialOrderReductionTime: 51.9ms, HoareTripleCheckerStatistics: 170 SDtfs, 192 SDslu, 233 SDs, 0 SdLazy, 159 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 131.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred in iteration=4, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 73.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 134 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.8ms SsaConstructionTime, 32.4ms SatisfiabilityAnalysisTime, 228.6ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 259 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 13/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process0Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 45 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 511.8ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 4.6ms, AutomataDifference: 187.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.9ms, PartialOrderReductionTime: 33.9ms, HoareTripleCheckerStatistics: 174 SDtfs, 207 SDslu, 224 SDs, 0 SdLazy, 146 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=222occurred in iteration=4, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 164 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.9ms SsaConstructionTime, 38.9ms SatisfiabilityAnalysisTime, 169.5ms InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 237 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 15/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...