/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/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:19:04,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:19:04,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:19:04,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:19:04,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:19:04,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:19:04,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:19:04,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:19:04,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:19:04,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:19:04,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:19:04,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:19:04,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:19:04,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:19:04,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:19:04,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:19:04,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:19:04,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:19:04,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:19:04,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:19:04,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:19:04,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:19:04,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:19:04,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:19:04,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:19:04,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:19:04,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:19:04,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:19:04,562 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 [2020-11-06 22:19:04,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:19:04,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:19:04,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:19:04,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:19:04,621 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:19:04,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:19:04,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:19:04,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:19:04,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:19:04,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:19:04,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:19:04,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:19:04,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:19:04,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:19:04,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:19:04,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:19:04,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:19:04,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:19:04,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:19:04,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:19:04,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:19:04,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:19:04,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:19:04,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:19:04,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:19:04,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:19:04,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:19:04,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:19:04,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:19:04,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:19:05,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:19:05,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:19:05,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:19:05,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:19:05,058 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:19:05,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-11-06 22:19:05,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4043a2f39/c1c6bbef84a44f32b8f942c449db759d/FLAGfb5cdde5f [2020-11-06 22:19:05,828 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:19:05,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-11-06 22:19:05,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4043a2f39/c1c6bbef84a44f32b8f942c449db759d/FLAGfb5cdde5f [2020-11-06 22:19:06,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4043a2f39/c1c6bbef84a44f32b8f942c449db759d [2020-11-06 22:19:06,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:19:06,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:19:06,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:06,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:19:06,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:19:06,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ff3652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06, skipping insertion in model container [2020-11-06 22:19:06,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:19:06,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:19:06,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:06,438 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:19:06,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:06,470 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:19:06,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06 WrapperNode [2020-11-06 22:19:06,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:06,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:19:06,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:19:06,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:19:06,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (1/1) ... [2020-11-06 22:19:06,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:19:06,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:19:06,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:19:06,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:19:06,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (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 [2020-11-06 22:19:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:19:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:19:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:19:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-06 22:19:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-06 22:19:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:19:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 22:19:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:19:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:19:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:19:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:19:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-06 22:19:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-06 22:19:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:19:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:19:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:19:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:19:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:19:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:19:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:19:06,904 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:19:06,905 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:19:06,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:06 BoogieIcfgContainer [2020-11-06 22:19:06,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:19:06,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:19:06,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:19:06,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:19:06,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:19:06" (1/3) ... [2020-11-06 22:19:06,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e77964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:06, skipping insertion in model container [2020-11-06 22:19:06,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:06" (2/3) ... [2020-11-06 22:19:06,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e77964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:06, skipping insertion in model container [2020-11-06 22:19:06,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:06" (3/3) ... [2020-11-06 22:19:06,919 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-11-06 22:19:06,943 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:19:06,971 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:19:07,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:19:07,068 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:19:07,068 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:19:07,068 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:19:07,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:19:07,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:19:07,069 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:19:07,069 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:19:07,069 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:19:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-06 22:19:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:19:07,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:07,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:07,109 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-11-06 22:19:07,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:07,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935321709] [2020-11-06 22:19:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:07,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:07,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:19:07,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935321709] [2020-11-06 22:19:07,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:07,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:07,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596661675] [2020-11-06 22:19:07,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:07,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:07,761 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-11-06 22:19:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:08,044 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-11-06 22:19:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:08,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:19:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:08,057 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:19:08,057 INFO L226 Difference]: Without dead ends: 28 [2020-11-06 22:19:08,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-06 22:19:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-06 22:19:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-06 22:19:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-06 22:19:08,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-11-06 22:19:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:08,125 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-06 22:19:08,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-06 22:19:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:19:08,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:08,128 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, 1, 1] [2020-11-06 22:19:08,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:19:08,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:08,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-11-06 22:19:08,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:08,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374060166] [2020-11-06 22:19:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:19:08,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374060166] [2020-11-06 22:19:08,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:08,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:08,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680248671] [2020-11-06 22:19:08,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:08,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:08,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:08,350 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-11-06 22:19:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:08,660 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-11-06 22:19:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:08,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-06 22:19:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:08,663 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:19:08,663 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:19:08,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:19:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:19:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:19:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-06 22:19:08,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-11-06 22:19:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:08,677 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-06 22:19:08,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-06 22:19:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:19:08,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:08,679 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, 1, 1] [2020-11-06 22:19:08,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:19:08,680 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:08,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-11-06 22:19:08,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:08,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634781312] [2020-11-06 22:19:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:19:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634781312] [2020-11-06 22:19:08,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:08,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:19:08,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592939210] [2020-11-06 22:19:08,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:19:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:19:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:08,969 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2020-11-06 22:19:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:09,396 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-06 22:19:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:09,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-06 22:19:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:09,399 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:19:09,399 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:19:09,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:19:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:19:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:19:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-06 22:19:09,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-11-06 22:19:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:09,412 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-06 22:19:09,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:19:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-06 22:19:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:09,414 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:09,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:09,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:19:09,414 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:09,415 INFO L82 PathProgramCache]: Analyzing trace with hash 20115896, now seen corresponding path program 1 times [2020-11-06 22:19:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:09,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748572091] [2020-11-06 22:19:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:09,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748572091] [2020-11-06 22:19:09,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:09,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:09,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490125786] [2020-11-06 22:19:09,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:09,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:09,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:09,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:09,662 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-11-06 22:19:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:09,910 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-06 22:19:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:09,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-06 22:19:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:09,913 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:19:09,913 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:19:09,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:19:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-11-06 22:19:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:19:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:19:09,933 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:19:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:09,933 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:19:09,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:19:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:09,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:09,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:09,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:19:09,935 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1776835463, now seen corresponding path program 1 times [2020-11-06 22:19:09,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:09,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631697328] [2020-11-06 22:19:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:10,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631697328] [2020-11-06 22:19:10,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:10,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:19:10,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400735216] [2020-11-06 22:19:10,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:19:10,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:10,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:19:10,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:10,135 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-11-06 22:19:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:10,604 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-11-06 22:19:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:10,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-11-06 22:19:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:10,608 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:19:10,608 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:19:10,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:10,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:19:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-11-06 22:19:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:19:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-06 22:19:10,631 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2020-11-06 22:19:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:10,632 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-06 22:19:10,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:19:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-06 22:19:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:10,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:10,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:10,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:19:10,637 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash -889331782, now seen corresponding path program 1 times [2020-11-06 22:19:10,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:10,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078627083] [2020-11-06 22:19:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:10,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078627083] [2020-11-06 22:19:10,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373304808] [2020-11-06 22:19:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:19:11,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:11,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:11,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-06 22:19:11,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645952227] [2020-11-06 22:19:11,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:19:11,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:11,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:19:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:19:11,151 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-11-06 22:19:11,852 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-06 22:19:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:12,080 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-06 22:19:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:19:12,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-06 22:19:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:12,083 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:19:12,083 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:19:12,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:19:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:19:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-11-06 22:19:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:19:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:19:12,099 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:19:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:12,100 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:19:12,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:19:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:19:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:19:12,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:12,104 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:12,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:19:12,306 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:12,307 INFO L82 PathProgramCache]: Analyzing trace with hash -6218534, now seen corresponding path program 1 times [2020-11-06 22:19:12,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:12,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041722549] [2020-11-06 22:19:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:12,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:12,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:12,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:12,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:12,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:12,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041722549] [2020-11-06 22:19:12,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:12,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:19:12,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666875950] [2020-11-06 22:19:12,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:19:12,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:19:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:12,574 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-11-06 22:19:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:13,082 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-11-06 22:19:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:13,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-11-06 22:19:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:13,086 INFO L225 Difference]: With dead ends: 59 [2020-11-06 22:19:13,086 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:19:13,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:19:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-06 22:19:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:19:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-06 22:19:13,109 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-11-06 22:19:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:13,110 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-06 22:19:13,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:19:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-06 22:19:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:19:13,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:13,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:13,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:19:13,117 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1803169893, now seen corresponding path program 1 times [2020-11-06 22:19:13,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:13,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728330105] [2020-11-06 22:19:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:13,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728330105] [2020-11-06 22:19:13,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317654369] [2020-11-06 22:19:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:19:13,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 22:19:13,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:13,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2020-11-06 22:19:13,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719548445] [2020-11-06 22:19:13,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:19:13,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:13,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:19:13,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:13,541 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-11-06 22:19:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:13,560 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-06 22:19:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:19:13,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-11-06 22:19:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:13,562 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:19:13,562 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:19:13,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:19:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-06 22:19:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:19:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-06 22:19:13,572 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-11-06 22:19:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:13,573 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-06 22:19:13,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:19:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-06 22:19:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:19:13,574 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:13,574 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:13,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:13,790 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:13,791 INFO L82 PathProgramCache]: Analyzing trace with hash -915666212, now seen corresponding path program 1 times [2020-11-06 22:19:13,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:13,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736858315] [2020-11-06 22:19:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736858315] [2020-11-06 22:19:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800525261] [2020-11-06 22:19:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-06 22:19:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:14,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:14,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-11-06 22:19:14,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157839732] [2020-11-06 22:19:14,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:19:14,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:14,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:19:14,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:19:14,235 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 16 states. [2020-11-06 22:19:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:15,310 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-11-06 22:19:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:19:15,310 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-11-06 22:19:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:15,311 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:19:15,312 INFO L226 Difference]: Without dead ends: 52 [2020-11-06 22:19:15,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:19:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-06 22:19:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-11-06 22:19:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:19:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-06 22:19:15,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-11-06 22:19:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:15,321 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-06 22:19:15,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:19:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-06 22:19:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:19:15,322 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:15,322 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:15,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:15,538 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash -30908644, now seen corresponding path program 1 times [2020-11-06 22:19:15,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:15,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154768623] [2020-11-06 22:19:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154768623] [2020-11-06 22:19:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656182400] [2020-11-06 22:19:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:19:15,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-06 22:19:16,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:16,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2020-11-06 22:19:16,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878612810] [2020-11-06 22:19:16,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:19:16,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:16,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:19:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:19:16,032 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-11-06 22:19:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:16,061 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-11-06 22:19:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:19:16,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-11-06 22:19:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:16,062 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:19:16,062 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:19:16,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:19:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:19:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-06 22:19:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:19:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-06 22:19:16,071 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 43 [2020-11-06 22:19:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:16,071 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-06 22:19:16,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:19:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-06 22:19:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:19:16,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:16,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:16,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:16,289 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1827860003, now seen corresponding path program 2 times [2020-11-06 22:19:16,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:16,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221619346] [2020-11-06 22:19:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:16,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221619346] [2020-11-06 22:19:16,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326610776] [2020-11-06 22:19:16,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:16,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:19:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:19:16,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:16,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:16,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 19 [2020-11-06 22:19:16,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543307228] [2020-11-06 22:19:16,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:19:16,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:19:16,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:19:16,875 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 19 states. [2020-11-06 22:19:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:18,058 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-11-06 22:19:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:19:18,059 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-11-06 22:19:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:18,060 INFO L225 Difference]: With dead ends: 81 [2020-11-06 22:19:18,060 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:19:18,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2020-11-06 22:19:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:19:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-11-06 22:19:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:19:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-11-06 22:19:18,074 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 43 [2020-11-06 22:19:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:18,074 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-11-06 22:19:18,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:19:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-11-06 22:19:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-06 22:19:18,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:18,076 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:18,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-06 22:19:18,290 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:18,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:18,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2448331, now seen corresponding path program 2 times [2020-11-06 22:19:18,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:18,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992477541] [2020-11-06 22:19:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:19:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992477541] [2020-11-06 22:19:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200394791] [2020-11-06 22:19:18,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:18,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-06 22:19:18,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:19:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-06 22:19:18,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:18,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2020-11-06 22:19:18,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329149421] [2020-11-06 22:19:18,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:19:18,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:19:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:19:18,799 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-11-06 22:19:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:18,809 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-06 22:19:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:19:18,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-11-06 22:19:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:18,810 INFO L225 Difference]: With dead ends: 56 [2020-11-06 22:19:18,810 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:19:18,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:19:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:19:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:19:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:19:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:19:18,812 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-11-06 22:19:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:18,813 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:19:18,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:19:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:19:18,813 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:19:19,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:19,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:19:19,106 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:19:19,106 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:19:19,106 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:19:19,106 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:19:19,107 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:19,108 INFO L262 CegarLoopResult]: 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|)) [2020-11-06 22:19:19,108 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:19,108 INFO L266 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-06 22:19:19,108 INFO L266 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-06 22:19:19,108 INFO L266 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-11-06 22:19:19,108 INFO L269 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-11-06 22:19:19,108 INFO L266 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-06 22:19:19,108 INFO L266 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-11-06 22:19:19,109 INFO L269 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-11-06 22:19:19,109 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:19,109 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:19:19,109 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:19:19,109 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:19,109 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 23 29) the Hoare annotation is: true [2020-11-06 22:19:19,109 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-11-06 22:19:19,110 INFO L266 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-11-06 22:19:19,110 INFO L266 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-06 22:19:19,110 INFO L269 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-11-06 22:19:19,110 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 23 29) no Hoare annotation was computed. [2020-11-06 22:19:19,110 INFO L266 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-06 22:19:19,110 INFO L266 CegarLoopResult]: For program point L26-2(lines 23 29) no Hoare annotation was computed. [2020-11-06 22:19:19,110 INFO L266 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-11-06 22:19:19,110 INFO L266 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-06 22:19:19,110 INFO L269 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-11-06 22:19:19,111 INFO L266 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-11-06 22:19:19,111 INFO L266 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-06 22:19:19,111 INFO L266 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-06 22:19:19,111 INFO L269 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-11-06 22:19:19,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:19:19 BoogieIcfgContainer [2020-11-06 22:19:19,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:19:19,120 INFO L168 Benchmark]: Toolchain (without parser) took 12900.26 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 126.8 MB in the beginning and 121.7 MB in the end (delta: 5.1 MB). Peak memory consumption was 117.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:19,120 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:19:19,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.40 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:19,123 INFO L168 Benchmark]: Boogie Preprocessor took 33.43 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:19,134 INFO L168 Benchmark]: RCFGBuilder took 401.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 102.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:19,135 INFO L168 Benchmark]: TraceAbstraction took 12208.34 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 101.6 MB in the beginning and 121.7 MB in the end (delta: -20.2 MB). Peak memory consumption was 91.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:19,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.40 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.43 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 401.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 102.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12208.34 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 101.6 MB in the beginning and 121.7 MB in the end (delta: -20.2 MB). Peak memory consumption was 91.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 324 SDtfs, 221 SDslu, 898 SDs, 0 SdLazy, 2061 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 527 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 38 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 24 NumberOfFragments, 41 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 180 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 627 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 609 ConstructedInterpolants, 0 QuantifiedInterpolants, 72051 SizeOfPredicates, 17 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 179/231 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...