/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:08:20,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:08:20,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:08:20,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:08:20,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:08:20,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:08:20,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:08:20,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:08:20,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:08:20,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:08:20,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:08:20,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:08:20,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:08:20,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:08:20,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:08:20,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:08:20,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:08:20,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:08:20,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:08:20,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:08:20,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:08:20,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:08:20,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:08:20,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:08:20,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:08:20,487 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:08:20,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:08:20,488 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:08:20,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:08:20,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:08:20,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:08:20,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:08:20,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:08:20,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:08:20,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:08:20,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:08:20,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:08:20,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:08:20,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:08:20,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:08:20,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:08:20,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:20,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:08:20,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:08:20,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:08:20,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:08:20,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:08:20,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:08:20,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:08:20,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:08:20,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:08:20,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:08:20,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:08:20,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:08:20,924 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:08:20,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2021-02-21 16:08:21,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf081806/1a6cfe8ab7f6482198d4af75daea97f5/FLAG9a060a8d4 [2021-02-21 16:08:21,738 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:08:21,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2021-02-21 16:08:21,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf081806/1a6cfe8ab7f6482198d4af75daea97f5/FLAG9a060a8d4 [2021-02-21 16:08:22,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf081806/1a6cfe8ab7f6482198d4af75daea97f5 [2021-02-21 16:08:22,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:08:22,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:08:22,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:22,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:08:22,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:08:22,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be9e26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22, skipping insertion in model container [2021-02-21 16:08:22,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:08:22,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:08:22,346 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c[2207,2220] [2021-02-21 16:08:22,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:22,368 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:08:22,391 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c[2207,2220] [2021-02-21 16:08:22,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:22,412 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:08:22,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22 WrapperNode [2021-02-21 16:08:22,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:22,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:08:22,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:08:22,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:08:22,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (1/1) ... [2021-02-21 16:08:22,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:08:22,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:08:22,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:08:22,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:08:22,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (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 [2021-02-21 16:08:22,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:08:22,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:08:22,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:08:22,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:08:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:08:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:08:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:08:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:08:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:08:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:08:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:08:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:08:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:08:22,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:08:22,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:08:22,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:08:22,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:08:22,958 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:08:22,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:22 BoogieIcfgContainer [2021-02-21 16:08:22,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:08:22,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:08:22,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:08:22,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:08:22,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:08:22" (1/3) ... [2021-02-21 16:08:22,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d850bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:22, skipping insertion in model container [2021-02-21 16:08:22,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:22" (2/3) ... [2021-02-21 16:08:22,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d850bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:22, skipping insertion in model container [2021-02-21 16:08:22,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:22" (3/3) ... [2021-02-21 16:08:22,978 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2021-02-21 16:08:22,994 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:08:23,004 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:08:23,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:08:23,091 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:08:23,091 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:08:23,092 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:08:23,092 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:08:23,092 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:08:23,092 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:08:23,093 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:08:23,093 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:08:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-21 16:08:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 16:08:23,144 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:23,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:23,145 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash -663266717, now seen corresponding path program 1 times [2021-02-21 16:08:23,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:23,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261629606] [2021-02-21 16:08:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:23,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:23,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:23,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:23,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:23,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:23,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:23,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:23,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:23,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:23,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261629606] [2021-02-21 16:08:23,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:23,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:23,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090038762] [2021-02-21 16:08:23,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:23,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:23,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:23,721 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2021-02-21 16:08:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:24,056 INFO L93 Difference]: Finished difference Result 58 states and 91 transitions. [2021-02-21 16:08:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:24,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-02-21 16:08:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:24,071 INFO L225 Difference]: With dead ends: 58 [2021-02-21 16:08:24,071 INFO L226 Difference]: Without dead ends: 43 [2021-02-21 16:08:24,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-21 16:08:24,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-02-21 16:08:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-21 16:08:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2021-02-21 16:08:24,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 16 [2021-02-21 16:08:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:24,125 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2021-02-21 16:08:24,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2021-02-21 16:08:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 16:08:24,127 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:24,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:24,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:08:24,127 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1472613343, now seen corresponding path program 1 times [2021-02-21 16:08:24,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:24,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973085433] [2021-02-21 16:08:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:24,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:24,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973085433] [2021-02-21 16:08:24,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:24,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:24,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468994384] [2021-02-21 16:08:24,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:24,230 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand 4 states. [2021-02-21 16:08:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:24,395 INFO L93 Difference]: Finished difference Result 68 states and 113 transitions. [2021-02-21 16:08:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:24,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-02-21 16:08:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:24,398 INFO L225 Difference]: With dead ends: 68 [2021-02-21 16:08:24,398 INFO L226 Difference]: Without dead ends: 43 [2021-02-21 16:08:24,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-21 16:08:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-02-21 16:08:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-21 16:08:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2021-02-21 16:08:24,412 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 16 [2021-02-21 16:08:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:24,413 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2021-02-21 16:08:24,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2021-02-21 16:08:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:08:24,414 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:24,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:24,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:08:24,415 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:24,416 INFO L82 PathProgramCache]: Analyzing trace with hash 913783256, now seen corresponding path program 1 times [2021-02-21 16:08:24,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:24,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502085892] [2021-02-21 16:08:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:24,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:24,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502085892] [2021-02-21 16:08:24,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:24,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047208879] [2021-02-21 16:08:24,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:24,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:24,539 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand 4 states. [2021-02-21 16:08:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:24,747 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2021-02-21 16:08:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:24,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-21 16:08:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:24,754 INFO L225 Difference]: With dead ends: 64 [2021-02-21 16:08:24,754 INFO L226 Difference]: Without dead ends: 46 [2021-02-21 16:08:24,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-21 16:08:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-02-21 16:08:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-21 16:08:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 68 transitions. [2021-02-21 16:08:24,769 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 68 transitions. Word has length 17 [2021-02-21 16:08:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:24,769 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 68 transitions. [2021-02-21 16:08:24,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 68 transitions. [2021-02-21 16:08:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:08:24,771 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:24,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:24,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:08:24,772 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1593841626, now seen corresponding path program 1 times [2021-02-21 16:08:24,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:24,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307800466] [2021-02-21 16:08:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:24,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:24,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307800466] [2021-02-21 16:08:24,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:24,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469515032] [2021-02-21 16:08:24,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:24,891 INFO L87 Difference]: Start difference. First operand 44 states and 68 transitions. Second operand 4 states. [2021-02-21 16:08:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,056 INFO L93 Difference]: Finished difference Result 112 states and 180 transitions. [2021-02-21 16:08:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-21 16:08:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,059 INFO L225 Difference]: With dead ends: 112 [2021-02-21 16:08:25,059 INFO L226 Difference]: Without dead ends: 77 [2021-02-21 16:08:25,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-21 16:08:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-02-21 16:08:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-21 16:08:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 117 transitions. [2021-02-21 16:08:25,088 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 117 transitions. Word has length 17 [2021-02-21 16:08:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:25,089 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 117 transitions. [2021-02-21 16:08:25,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 117 transitions. [2021-02-21 16:08:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:08:25,096 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:25,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:25,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:08:25,096 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1891779044, now seen corresponding path program 1 times [2021-02-21 16:08:25,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:25,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918521282] [2021-02-21 16:08:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:25,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:25,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918521282] [2021-02-21 16:08:25,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:25,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:25,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499803606] [2021-02-21 16:08:25,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:25,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:25,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:25,219 INFO L87 Difference]: Start difference. First operand 75 states and 117 transitions. Second operand 4 states. [2021-02-21 16:08:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,384 INFO L93 Difference]: Finished difference Result 95 states and 147 transitions. [2021-02-21 16:08:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-21 16:08:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,389 INFO L225 Difference]: With dead ends: 95 [2021-02-21 16:08:25,389 INFO L226 Difference]: Without dead ends: 93 [2021-02-21 16:08:25,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-21 16:08:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2021-02-21 16:08:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-21 16:08:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2021-02-21 16:08:25,406 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 17 [2021-02-21 16:08:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:25,407 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2021-02-21 16:08:25,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2021-02-21 16:08:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:08:25,408 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:25,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:25,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:08:25,409 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:25,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2130301802, now seen corresponding path program 1 times [2021-02-21 16:08:25,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:25,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306823752] [2021-02-21 16:08:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:25,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:25,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306823752] [2021-02-21 16:08:25,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:25,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:25,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065003345] [2021-02-21 16:08:25,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:25,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:25,486 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 4 states. [2021-02-21 16:08:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,611 INFO L93 Difference]: Finished difference Result 131 states and 203 transitions. [2021-02-21 16:08:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 16:08:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,614 INFO L225 Difference]: With dead ends: 131 [2021-02-21 16:08:25,614 INFO L226 Difference]: Without dead ends: 129 [2021-02-21 16:08:25,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-21 16:08:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-02-21 16:08:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-21 16:08:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 157 transitions. [2021-02-21 16:08:25,630 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 157 transitions. Word has length 18 [2021-02-21 16:08:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:25,631 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 157 transitions. [2021-02-21 16:08:25,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 157 transitions. [2021-02-21 16:08:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:08:25,632 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:25,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:25,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:08:25,633 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:25,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1355318868, now seen corresponding path program 1 times [2021-02-21 16:08:25,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:25,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184313273] [2021-02-21 16:08:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,658 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:25,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:25,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184313273] [2021-02-21 16:08:25,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:25,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:25,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027938583] [2021-02-21 16:08:25,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:25,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:25,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:25,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:25,702 INFO L87 Difference]: Start difference. First operand 103 states and 157 transitions. Second operand 4 states. [2021-02-21 16:08:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,816 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2021-02-21 16:08:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 16:08:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,819 INFO L225 Difference]: With dead ends: 231 [2021-02-21 16:08:25,819 INFO L226 Difference]: Without dead ends: 137 [2021-02-21 16:08:25,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-21 16:08:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-02-21 16:08:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-21 16:08:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 199 transitions. [2021-02-21 16:08:25,837 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 199 transitions. Word has length 18 [2021-02-21 16:08:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:25,837 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 199 transitions. [2021-02-21 16:08:25,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 199 transitions. [2021-02-21 16:08:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:25,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:25,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:25,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:08:25,840 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1614630737, now seen corresponding path program 1 times [2021-02-21 16:08:25,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:25,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168964408] [2021-02-21 16:08:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:25,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:25,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168964408] [2021-02-21 16:08:25,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:25,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354046943] [2021-02-21 16:08:25,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:25,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:25,914 INFO L87 Difference]: Start difference. First operand 135 states and 199 transitions. Second operand 4 states. [2021-02-21 16:08:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,009 INFO L93 Difference]: Finished difference Result 205 states and 301 transitions. [2021-02-21 16:08:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,011 INFO L225 Difference]: With dead ends: 205 [2021-02-21 16:08:26,011 INFO L226 Difference]: Without dead ends: 143 [2021-02-21 16:08:26,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-21 16:08:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-02-21 16:08:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-21 16:08:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 203 transitions. [2021-02-21 16:08:26,026 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 203 transitions. Word has length 19 [2021-02-21 16:08:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,027 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 203 transitions. [2021-02-21 16:08:26,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 203 transitions. [2021-02-21 16:08:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:26,028 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:08:26,029 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,030 INFO L82 PathProgramCache]: Analyzing trace with hash -934572367, now seen corresponding path program 1 times [2021-02-21 16:08:26,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954082533] [2021-02-21 16:08:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954082533] [2021-02-21 16:08:26,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604056275] [2021-02-21 16:08:26,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,090 INFO L87 Difference]: Start difference. First operand 141 states and 203 transitions. Second operand 4 states. [2021-02-21 16:08:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,199 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2021-02-21 16:08:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,201 INFO L225 Difference]: With dead ends: 237 [2021-02-21 16:08:26,202 INFO L226 Difference]: Without dead ends: 235 [2021-02-21 16:08:26,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-02-21 16:08:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2021-02-21 16:08:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-02-21 16:08:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 283 transitions. [2021-02-21 16:08:26,217 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 283 transitions. Word has length 19 [2021-02-21 16:08:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,217 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 283 transitions. [2021-02-21 16:08:26,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 283 transitions. [2021-02-21 16:08:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:26,220 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:08:26,220 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1743918993, now seen corresponding path program 1 times [2021-02-21 16:08:26,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363540022] [2021-02-21 16:08:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363540022] [2021-02-21 16:08:26,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131756429] [2021-02-21 16:08:26,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,281 INFO L87 Difference]: Start difference. First operand 201 states and 283 transitions. Second operand 4 states. [2021-02-21 16:08:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,381 INFO L93 Difference]: Finished difference Result 445 states and 621 transitions. [2021-02-21 16:08:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,384 INFO L225 Difference]: With dead ends: 445 [2021-02-21 16:08:26,384 INFO L226 Difference]: Without dead ends: 259 [2021-02-21 16:08:26,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-02-21 16:08:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-02-21 16:08:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-02-21 16:08:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 343 transitions. [2021-02-21 16:08:26,406 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 343 transitions. Word has length 19 [2021-02-21 16:08:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,408 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 343 transitions. [2021-02-21 16:08:26,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 343 transitions. [2021-02-21 16:08:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:26,413 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:08:26,414 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1093243721, now seen corresponding path program 1 times [2021-02-21 16:08:26,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105723993] [2021-02-21 16:08:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:26,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105723993] [2021-02-21 16:08:26,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260237774] [2021-02-21 16:08:26,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,516 INFO L87 Difference]: Start difference. First operand 257 states and 343 transitions. Second operand 4 states. [2021-02-21 16:08:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,630 INFO L93 Difference]: Finished difference Result 385 states and 509 transitions. [2021-02-21 16:08:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,632 INFO L225 Difference]: With dead ends: 385 [2021-02-21 16:08:26,632 INFO L226 Difference]: Without dead ends: 267 [2021-02-21 16:08:26,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-21 16:08:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-02-21 16:08:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-02-21 16:08:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 343 transitions. [2021-02-21 16:08:26,648 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 343 transitions. Word has length 20 [2021-02-21 16:08:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,649 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 343 transitions. [2021-02-21 16:08:26,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 343 transitions. [2021-02-21 16:08:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:26,650 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:08:26,650 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1773302091, now seen corresponding path program 1 times [2021-02-21 16:08:26,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268783462] [2021-02-21 16:08:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268783462] [2021-02-21 16:08:26,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879545058] [2021-02-21 16:08:26,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,727 INFO L87 Difference]: Start difference. First operand 265 states and 343 transitions. Second operand 4 states. [2021-02-21 16:08:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,826 INFO L93 Difference]: Finished difference Result 427 states and 544 transitions. [2021-02-21 16:08:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,829 INFO L225 Difference]: With dead ends: 427 [2021-02-21 16:08:26,830 INFO L226 Difference]: Without dead ends: 425 [2021-02-21 16:08:26,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-02-21 16:08:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 393. [2021-02-21 16:08:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2021-02-21 16:08:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 495 transitions. [2021-02-21 16:08:26,849 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 495 transitions. Word has length 20 [2021-02-21 16:08:26,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,849 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 495 transitions. [2021-02-21 16:08:26,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 495 transitions. [2021-02-21 16:08:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:26,851 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:08:26,851 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 963955465, now seen corresponding path program 1 times [2021-02-21 16:08:26,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890662821] [2021-02-21 16:08:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890662821] [2021-02-21 16:08:26,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600502959] [2021-02-21 16:08:26,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,906 INFO L87 Difference]: Start difference. First operand 393 states and 495 transitions. Second operand 4 states. [2021-02-21 16:08:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:27,013 INFO L93 Difference]: Finished difference Result 857 states and 1055 transitions. [2021-02-21 16:08:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:27,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:27,014 INFO L225 Difference]: With dead ends: 857 [2021-02-21 16:08:27,014 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:08:27,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:08:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:08:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:08:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:08:27,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-02-21 16:08:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:27,018 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:08:27,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:08:27,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:08:27,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:08:27,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:08:27,365 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 32 [2021-02-21 16:08:27,398 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:08:27,399 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:08:27,399 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:08:27,399 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:27,399 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 16:08:27,400 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:27,400 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:27,400 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:08:27,400 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:08:27,400 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:27,400 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 95) no Hoare annotation was computed. [2021-02-21 16:08:27,400 INFO L192 CegarLoopUtils]: At program point L85-1(lines 26 90) the Hoare annotation is: true [2021-02-21 16:08:27,400 INFO L189 CegarLoopUtils]: For program point L81(line 81) no Hoare annotation was computed. [2021-02-21 16:08:27,401 INFO L189 CegarLoopUtils]: For program point L65-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,401 INFO L189 CegarLoopUtils]: For program point L28(lines 28 30) no Hoare annotation was computed. [2021-02-21 16:08:27,401 INFO L189 CegarLoopUtils]: For program point L86(line 86) no Hoare annotation was computed. [2021-02-21 16:08:27,401 INFO L185 CegarLoopUtils]: At program point L86-1(lines 7 95) the Hoare annotation is: false [2021-02-21 16:08:27,401 INFO L189 CegarLoopUtils]: For program point L70-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,401 INFO L189 CegarLoopUtils]: For program point L66(line 66) no Hoare annotation was computed. [2021-02-21 16:08:27,401 INFO L192 CegarLoopUtils]: At program point L91(lines 7 95) the Hoare annotation is: true [2021-02-21 16:08:27,401 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 95) no Hoare annotation was computed. [2021-02-21 16:08:27,402 INFO L189 CegarLoopUtils]: For program point L75-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,402 INFO L189 CegarLoopUtils]: For program point L71(line 71) no Hoare annotation was computed. [2021-02-21 16:08:27,402 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 93) no Hoare annotation was computed. [2021-02-21 16:08:27,402 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 95) the Hoare annotation is: true [2021-02-21 16:08:27,402 INFO L189 CegarLoopUtils]: For program point L59-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,402 INFO L189 CegarLoopUtils]: For program point L55-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,402 INFO L189 CegarLoopUtils]: For program point L51-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,403 INFO L189 CegarLoopUtils]: For program point L80-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,403 INFO L189 CegarLoopUtils]: For program point L47-1(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,403 INFO L189 CegarLoopUtils]: For program point L76(line 76) no Hoare annotation was computed. [2021-02-21 16:08:27,403 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-02-21 16:08:27,403 INFO L189 CegarLoopUtils]: For program point L43-2(lines 26 90) no Hoare annotation was computed. [2021-02-21 16:08:27,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:08:27 BoogieIcfgContainer [2021-02-21 16:08:27,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:08:27,417 INFO L168 Benchmark]: Toolchain (without parser) took 5307.12 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 139.1 MB in the beginning and 158.9 MB in the end (delta: -19.8 MB). Peak memory consumption was 106.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:27,418 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 164.6 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:08:27,418 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.86 ms. Allocated memory is still 164.6 MB. Free memory was 138.0 MB in the beginning and 127.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:27,419 INFO L168 Benchmark]: Boogie Preprocessor took 40.94 ms. Allocated memory is still 164.6 MB. Free memory was 127.9 MB in the beginning and 126.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:27,419 INFO L168 Benchmark]: RCFGBuilder took 503.95 ms. Allocated memory is still 164.6 MB. Free memory was 126.3 MB in the beginning and 109.7 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:27,420 INFO L168 Benchmark]: TraceAbstraction took 4453.34 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 109.3 MB in the beginning and 158.9 MB in the end (delta: -49.6 MB). Peak memory consumption was 77.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:27,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 164.6 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.86 ms. Allocated memory is still 164.6 MB. Free memory was 138.0 MB in the beginning and 127.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.94 ms. Allocated memory is still 164.6 MB. Free memory was 127.9 MB in the beginning and 126.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 503.95 ms. Allocated memory is still 164.6 MB. Free memory was 126.3 MB in the beginning and 109.7 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4453.34 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 109.3 MB in the beginning and 158.9 MB in the end (delta: -49.6 MB). Peak memory consumption was 77.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.9s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 615 SDtfs, 831 SDslu, 82 SDs, 0 SdLazy, 453 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=393occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 136 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 52502 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 236 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 223 ConstructedInterpolants, 0 QuantifiedInterpolants, 13206 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...