/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/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:51,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:51,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:51,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:51,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:51,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:51,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:51,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:51,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:51,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:51,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:51,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:51,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:51,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:51,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:51,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:51,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:51,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:51,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:51,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:51,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:51,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:51,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:51,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:51,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:51,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:51,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:51,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:51,593 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 [2020-10-23 18:43:51,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:51,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:51,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:51,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:51,634 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:51,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:51,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:51,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:51,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:51,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:51,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:51,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:51,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:51,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:51,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:51,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:51,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:51,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:51,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:51,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:51,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:51,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:51,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:51,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:51,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:51,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:51,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:51,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:51,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:51,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:52,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:52,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:52,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:52,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:52,162 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:52,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-10-23 18:43:52,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119e03e62/98efc6efa0bf431c9639fb5cafae348a/FLAGc4d332ea6 [2020-10-23 18:43:52,997 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:52,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-10-23 18:43:53,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119e03e62/98efc6efa0bf431c9639fb5cafae348a/FLAGc4d332ea6 [2020-10-23 18:43:53,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119e03e62/98efc6efa0bf431c9639fb5cafae348a [2020-10-23 18:43:53,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:53,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:53,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:53,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:53,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:53,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39efdaa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53, skipping insertion in model container [2020-10-23 18:43:53,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:53,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:53,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:53,621 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:53,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:53,689 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:53,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53 WrapperNode [2020-10-23 18:43:53,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:53,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:53,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:53,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:53,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (1/1) ... [2020-10-23 18:43:53,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:53,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:53,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:53,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:53,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (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 [2020-10-23 18:43:53,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:53,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:53,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:53,808 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:43:53,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:53,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:43:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:43:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:54,440 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:54,441 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:43:54,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:54 BoogieIcfgContainer [2020-10-23 18:43:54,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:54,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:54,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:54,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:54,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:53" (1/3) ... [2020-10-23 18:43:54,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a16afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:54, skipping insertion in model container [2020-10-23 18:43:54,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:53" (2/3) ... [2020-10-23 18:43:54,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a16afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:54, skipping insertion in model container [2020-10-23 18:43:54,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:54" (3/3) ... [2020-10-23 18:43:54,452 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i.v+cfa-reducer.c [2020-10-23 18:43:54,466 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:54,472 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:54,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:54,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:54,515 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:54,515 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:54,516 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:54,516 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:54,516 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:54,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:54,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-10-23 18:43:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-23 18:43:54,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:54,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:54,542 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1761043542, now seen corresponding path program 1 times [2020-10-23 18:43:54,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:54,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002612187] [2020-10-23 18:43:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:54,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:54,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002612187] [2020-10-23 18:43:54,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:54,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:43:54,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777758083] [2020-10-23 18:43:54,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:43:54,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:43:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:43:54,915 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states. [2020-10-23 18:43:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:55,362 INFO L93 Difference]: Finished difference Result 92 states and 139 transitions. [2020-10-23 18:43:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:55,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-23 18:43:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:55,388 INFO L225 Difference]: With dead ends: 92 [2020-10-23 18:43:55,389 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:43:55,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:43:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-10-23 18:43:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:43:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2020-10-23 18:43:55,449 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 14 [2020-10-23 18:43:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:55,450 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2020-10-23 18:43:55,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:43:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2020-10-23 18:43:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:43:55,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:55,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:55,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:55,452 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1340443989, now seen corresponding path program 1 times [2020-10-23 18:43:55,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:55,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224684056] [2020-10-23 18:43:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:55,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:55,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224684056] [2020-10-23 18:43:55,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:55,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:55,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26635643] [2020-10-23 18:43:55,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:55,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:55,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:55,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:55,575 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 5 states. [2020-10-23 18:43:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:55,941 INFO L93 Difference]: Finished difference Result 117 states and 170 transitions. [2020-10-23 18:43:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:55,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-23 18:43:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:55,944 INFO L225 Difference]: With dead ends: 117 [2020-10-23 18:43:55,944 INFO L226 Difference]: Without dead ends: 78 [2020-10-23 18:43:55,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-23 18:43:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2020-10-23 18:43:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:43:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-10-23 18:43:55,962 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 15 [2020-10-23 18:43:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:55,962 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-10-23 18:43:55,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-10-23 18:43:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:43:55,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:55,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:55,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:55,964 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1242212429, now seen corresponding path program 1 times [2020-10-23 18:43:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:55,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665636140] [2020-10-23 18:43:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:56,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665636140] [2020-10-23 18:43:56,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:56,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853764409] [2020-10-23 18:43:56,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:56,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:56,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:56,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:56,120 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states. [2020-10-23 18:43:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:56,343 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-23 18:43:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:56,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-23 18:43:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:56,344 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:43:56,345 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:43:56,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:43:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-10-23 18:43:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:43:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2020-10-23 18:43:56,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 15 [2020-10-23 18:43:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:56,359 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2020-10-23 18:43:56,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2020-10-23 18:43:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:56,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:56,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:56,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:43:56,360 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1395909301, now seen corresponding path program 1 times [2020-10-23 18:43:56,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:56,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460789185] [2020-10-23 18:43:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:56,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460789185] [2020-10-23 18:43:56,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:56,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:56,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470010964] [2020-10-23 18:43:56,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:56,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:56,489 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 5 states. [2020-10-23 18:43:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:56,729 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2020-10-23 18:43:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:56,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-23 18:43:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:56,732 INFO L225 Difference]: With dead ends: 77 [2020-10-23 18:43:56,732 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:43:56,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:43:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2020-10-23 18:43:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:43:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-10-23 18:43:56,747 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 16 [2020-10-23 18:43:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:56,747 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-10-23 18:43:56,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-10-23 18:43:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:43:56,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:56,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:56,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:43:56,749 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:56,749 INFO L82 PathProgramCache]: Analyzing trace with hash -323511465, now seen corresponding path program 1 times [2020-10-23 18:43:56,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:56,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254115545] [2020-10-23 18:43:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:56,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254115545] [2020-10-23 18:43:56,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:56,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:56,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406511224] [2020-10-23 18:43:56,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:56,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:56,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:56,849 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 6 states. [2020-10-23 18:43:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:57,177 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2020-10-23 18:43:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:57,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-23 18:43:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:57,179 INFO L225 Difference]: With dead ends: 77 [2020-10-23 18:43:57,179 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:43:57,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:43:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2020-10-23 18:43:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 18:43:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2020-10-23 18:43:57,192 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 17 [2020-10-23 18:43:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:57,193 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2020-10-23 18:43:57,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2020-10-23 18:43:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:43:57,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:57,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:57,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:43:57,194 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash -234239127, now seen corresponding path program 1 times [2020-10-23 18:43:57,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:57,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485604614] [2020-10-23 18:43:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:57,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485604614] [2020-10-23 18:43:57,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:57,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:57,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223844038] [2020-10-23 18:43:57,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:57,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:57,300 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 5 states. [2020-10-23 18:43:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:57,562 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-10-23 18:43:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:57,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-23 18:43:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:57,564 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:43:57,564 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 18:43:57,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 18:43:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-10-23 18:43:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:43:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-10-23 18:43:57,577 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2020-10-23 18:43:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:57,578 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-10-23 18:43:57,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-10-23 18:43:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:43:57,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:57,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:57,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:43:57,579 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:57,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1438913011, now seen corresponding path program 1 times [2020-10-23 18:43:57,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:57,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088056949] [2020-10-23 18:43:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:57,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088056949] [2020-10-23 18:43:57,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:57,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:57,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232462675] [2020-10-23 18:43:57,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:57,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:57,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:57,665 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 5 states. [2020-10-23 18:43:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:57,894 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2020-10-23 18:43:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:57,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-23 18:43:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:57,895 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:43:57,895 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:43:57,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:43:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2020-10-23 18:43:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:43:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-23 18:43:57,908 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 18 [2020-10-23 18:43:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:57,908 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-23 18:43:57,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-23 18:43:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:43:57,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:57,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:57,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:43:57,910 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:57,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1328540162, now seen corresponding path program 1 times [2020-10-23 18:43:57,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:57,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664150770] [2020-10-23 18:43:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:58,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664150770] [2020-10-23 18:43:58,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:58,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966374674] [2020-10-23 18:43:58,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:58,046 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 6 states. [2020-10-23 18:43:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:58,419 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2020-10-23 18:43:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:58,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:43:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:58,421 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:43:58,421 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:43:58,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:43:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2020-10-23 18:43:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:43:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-23 18:43:58,434 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2020-10-23 18:43:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:58,434 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-23 18:43:58,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-23 18:43:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:43:58,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:58,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:58,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:43:58,436 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1764905525, now seen corresponding path program 1 times [2020-10-23 18:43:58,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:58,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760755811] [2020-10-23 18:43:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:58,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760755811] [2020-10-23 18:43:58,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:58,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:58,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783922511] [2020-10-23 18:43:58,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:58,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:58,511 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-10-23 18:43:58,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:58,790 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-23 18:43:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:58,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-23 18:43:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:58,795 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:43:58,795 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 18:43:58,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 18:43:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-23 18:43:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:43:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-10-23 18:43:58,822 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 19 [2020-10-23 18:43:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:58,822 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-10-23 18:43:58,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-10-23 18:43:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:43:58,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:58,823 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] [2020-10-23 18:43:58,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:43:58,824 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1122529892, now seen corresponding path program 1 times [2020-10-23 18:43:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:58,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91185492] [2020-10-23 18:43:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:58,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91185492] [2020-10-23 18:43:58,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:58,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:58,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130910502] [2020-10-23 18:43:58,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:58,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:58,926 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 5 states. [2020-10-23 18:43:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:59,103 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-10-23 18:43:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:59,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-23 18:43:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:59,104 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:43:59,104 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 18:43:59,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 18:43:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-23 18:43:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:43:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-23 18:43:59,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2020-10-23 18:43:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:59,115 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-23 18:43:59,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-23 18:43:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:43:59,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:59,117 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] [2020-10-23 18:43:59,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:43:59,117 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash 438718509, now seen corresponding path program 1 times [2020-10-23 18:43:59,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:59,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878575195] [2020-10-23 18:43:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:59,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878575195] [2020-10-23 18:43:59,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:59,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:59,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016124891] [2020-10-23 18:43:59,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:59,188 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 5 states. [2020-10-23 18:43:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:59,419 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-10-23 18:43:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:59,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-23 18:43:59,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:59,421 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:43:59,421 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 18:43:59,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 18:43:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2020-10-23 18:43:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 18:43:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-23 18:43:59,433 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2020-10-23 18:43:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:59,446 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-23 18:43:59,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-23 18:43:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:43:59,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:59,449 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] [2020-10-23 18:43:59,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:43:59,449 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash 715406022, now seen corresponding path program 1 times [2020-10-23 18:43:59,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:59,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49837267] [2020-10-23 18:43:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:59,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49837267] [2020-10-23 18:43:59,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:59,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:59,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086598930] [2020-10-23 18:43:59,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:59,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:59,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:59,554 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 6 states. [2020-10-23 18:43:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:59,887 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-10-23 18:43:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:59,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-23 18:43:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:59,888 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:43:59,889 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 18:43:59,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 18:43:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 36. [2020-10-23 18:43:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:43:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-23 18:43:59,899 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 22 [2020-10-23 18:43:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:59,899 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-23 18:43:59,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-23 18:43:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:43:59,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:59,900 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, 1] [2020-10-23 18:43:59,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:43:59,901 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash 702788239, now seen corresponding path program 1 times [2020-10-23 18:43:59,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:59,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009344761] [2020-10-23 18:43:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:59,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009344761] [2020-10-23 18:43:59,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:59,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:43:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107321516] [2020-10-23 18:43:59,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:43:59,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:43:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:59,986 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 7 states. [2020-10-23 18:44:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:00,356 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-10-23 18:44:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:44:00,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-23 18:44:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:00,357 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:44:00,357 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:44:00,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:44:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-10-23 18:44:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:44:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-23 18:44:00,373 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-23 18:44:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:00,373 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-23 18:44:00,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-23 18:44:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:44:00,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:00,376 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, 1, 1] [2020-10-23 18:44:00,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:44:00,377 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash 311640872, now seen corresponding path program 1 times [2020-10-23 18:44:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:00,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158939857] [2020-10-23 18:44:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158939857] [2020-10-23 18:44:00,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:00,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:00,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450292758] [2020-10-23 18:44:00,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:00,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:00,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:00,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:00,465 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2020-10-23 18:44:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:00,869 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2020-10-23 18:44:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:00,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-23 18:44:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:00,871 INFO L225 Difference]: With dead ends: 88 [2020-10-23 18:44:00,871 INFO L226 Difference]: Without dead ends: 85 [2020-10-23 18:44:00,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:44:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-23 18:44:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 34. [2020-10-23 18:44:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:44:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-23 18:44:00,884 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-23 18:44:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:00,884 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-23 18:44:00,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-23 18:44:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:44:00,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:00,888 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, 1, 1, 1] [2020-10-23 18:44:00,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:44:00,888 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:00,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1070978289, now seen corresponding path program 1 times [2020-10-23 18:44:00,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:00,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323726774] [2020-10-23 18:44:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323726774] [2020-10-23 18:44:01,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:01,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:44:01,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582082899] [2020-10-23 18:44:01,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:01,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:01,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:01,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:01,004 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-10-23 18:44:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:01,361 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-23 18:44:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:44:01,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-23 18:44:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:01,363 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:44:01,363 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:44:01,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:44:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2020-10-23 18:44:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:44:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-23 18:44:01,370 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2020-10-23 18:44:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:01,370 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-23 18:44:01,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-23 18:44:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:44:01,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:01,371 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, 1, 1, 1, 1] [2020-10-23 18:44:01,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:44:01,371 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1159361654, now seen corresponding path program 1 times [2020-10-23 18:44:01,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:01,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699259186] [2020-10-23 18:44:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699259186] [2020-10-23 18:44:01,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:01,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:44:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860348744] [2020-10-23 18:44:01,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:01,469 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-10-23 18:44:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:02,028 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-10-23 18:44:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:44:02,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-23 18:44:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:02,029 INFO L225 Difference]: With dead ends: 126 [2020-10-23 18:44:02,029 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:02,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:02,031 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-10-23 18:44:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:02,032 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:02,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:02,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:02,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:44:02,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:02,607 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 132 [2020-10-23 18:44:03,111 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 113 [2020-10-23 18:44:03,660 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 156 [2020-10-23 18:44:03,943 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 22 [2020-10-23 18:44:04,119 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 13 [2020-10-23 18:44:04,512 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 38 [2020-10-23 18:44:04,517 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:44:04,517 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:44:04,517 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:44:04,517 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:44:04,517 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L270 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)|) (= ~__return_334~0 |old(~__return_334~0)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:44:04,518 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:04,518 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:04,518 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:44:04,518 INFO L270 CegarLoopResult]: At program point L217(line 217) the Hoare annotation is: false [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 313) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L217-1(line 217) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L151(lines 151 281) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L110(lines 110 123) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L36(lines 36 300) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L270 CegarLoopResult]: At program point L193(line 193) the Hoare annotation is: false [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L193-1(line 193) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L86(lines 86 127) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L20(lines 20 312) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L243(lines 243 267) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L270 CegarLoopResult]: At program point L177(line 177) the Hoare annotation is: false [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L177-1(line 177) no Hoare annotation was computed. [2020-10-23 18:44:04,519 INFO L274 CegarLoopResult]: For program point L45(lines 45 288) no Hoare annotation was computed. [2020-10-23 18:44:04,520 INFO L270 CegarLoopResult]: At program point L293(lines 38 294) the Hoare annotation is: (and (<= 0 main_~main__i~0) (< main_~main__i~0 main_~main__len~0) (<= 0 main_~main__j~0) (<= (+ main_~main__j~0 5) main_~main__bufsize~0) (= |old(~__return_334~0)| ~__return_334~0) (<= (+ main_~main__limit~0 4) main_~main__bufsize~0)) [2020-10-23 18:44:04,520 INFO L274 CegarLoopResult]: For program point L227(lines 227 269) no Hoare annotation was computed. [2020-10-23 18:44:04,520 INFO L270 CegarLoopResult]: At program point L153(line 153) the Hoare annotation is: false [2020-10-23 18:44:04,525 INFO L274 CegarLoopResult]: For program point L153-1(line 153) no Hoare annotation was computed. [2020-10-23 18:44:04,525 INFO L270 CegarLoopResult]: At program point L112(line 112) the Hoare annotation is: false [2020-10-23 18:44:04,526 INFO L274 CegarLoopResult]: For program point L112-1(line 112) no Hoare annotation was computed. [2020-10-23 18:44:04,526 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 13 313) no Hoare annotation was computed. [2020-10-23 18:44:04,526 INFO L274 CegarLoopResult]: For program point L203(lines 203 273) no Hoare annotation was computed. [2020-10-23 18:44:04,526 INFO L274 CegarLoopResult]: For program point L38(lines 38 294) no Hoare annotation was computed. [2020-10-23 18:44:04,526 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 13 313) the Hoare annotation is: (= |old(~__return_334~0)| ~__return_334~0) [2020-10-23 18:44:04,526 INFO L270 CegarLoopResult]: At program point L88(line 88) the Hoare annotation is: false [2020-10-23 18:44:04,526 INFO L274 CegarLoopResult]: For program point L88-1(line 88) no Hoare annotation was computed. [2020-10-23 18:44:04,526 INFO L270 CegarLoopResult]: At program point L245(line 245) the Hoare annotation is: false [2020-10-23 18:44:04,526 INFO L274 CegarLoopResult]: For program point L245-1(line 245) no Hoare annotation was computed. [2020-10-23 18:44:04,527 INFO L270 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: false [2020-10-23 18:44:04,527 INFO L274 CegarLoopResult]: For program point L47-1(line 47) no Hoare annotation was computed. [2020-10-23 18:44:04,527 INFO L270 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: false [2020-10-23 18:44:04,528 INFO L274 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-10-23 18:44:04,528 INFO L274 CegarLoopResult]: For program point L163(lines 163 279) no Hoare annotation was computed. [2020-10-23 18:44:04,529 INFO L270 CegarLoopResult]: At program point L304(lines 25 312) the Hoare annotation is: (and (<= 0 main_~main__i~0) (= |old(~__return_334~0)| ~__return_334~0) (<= (+ main_~main__limit~0 4) main_~main__bufsize~0)) [2020-10-23 18:44:04,529 INFO L270 CegarLoopResult]: At program point L205(line 205) the Hoare annotation is: false [2020-10-23 18:44:04,529 INFO L274 CegarLoopResult]: For program point L205-1(line 205) no Hoare annotation was computed. [2020-10-23 18:44:04,529 INFO L274 CegarLoopResult]: For program point L139(lines 139 283) no Hoare annotation was computed. [2020-10-23 18:44:04,529 INFO L274 CegarLoopResult]: For program point L98(lines 98 125) no Hoare annotation was computed. [2020-10-23 18:44:04,529 INFO L274 CegarLoopResult]: For program point L255(lines 255 265) no Hoare annotation was computed. [2020-10-23 18:44:04,529 INFO L274 CegarLoopResult]: For program point L57(lines 57 286) no Hoare annotation was computed. [2020-10-23 18:44:04,529 INFO L274 CegarLoopResult]: For program point L74(lines 74 129) no Hoare annotation was computed. [2020-10-23 18:44:04,530 INFO L270 CegarLoopResult]: At program point L264(lines 31 306) the Hoare annotation is: (let ((.cse4 (<= (+ main_~main__j~0 4) main_~main__bufsize~0)) (.cse0 (= |old(~__return_334~0)| ~__return_334~0)) (.cse1 (<= (+ main_~main__limit~0 4) main_~main__bufsize~0))) (let ((.cse2 (<= 1 main_~main__j~0)) (.cse3 (let ((.cse5 (<= 0 main_~main__j~0)) (.cse6 (<= 1 main_~main__i~0))) (or (and .cse5 .cse6 .cse0 (not (= main_~__VERIFIER_assert__cond~12 0)) .cse1) (and .cse5 .cse6 .cse4 .cse0 .cse1))))) (or (and (<= 0 main_~main__i~0) (= main_~main__j~0 0) (< main_~main__i~0 main_~main__len~0) .cse0 .cse1) (and .cse2 .cse3 (not (= main_~__VERIFIER_assert__cond~14 0))) (and .cse2 .cse3 .cse4)))) [2020-10-23 18:44:04,530 INFO L270 CegarLoopResult]: At program point L165(line 165) the Hoare annotation is: false [2020-10-23 18:44:04,530 INFO L274 CegarLoopResult]: For program point L165-1(line 165) no Hoare annotation was computed. [2020-10-23 18:44:04,530 INFO L274 CegarLoopResult]: For program point L66(lines 66 285) no Hoare annotation was computed. [2020-10-23 18:44:04,530 INFO L274 CegarLoopResult]: For program point L215(lines 215 271) no Hoare annotation was computed. [2020-10-23 18:44:04,530 INFO L270 CegarLoopResult]: At program point L141(line 141) the Hoare annotation is: false [2020-10-23 18:44:04,530 INFO L274 CegarLoopResult]: For program point L141-1(line 141) no Hoare annotation was computed. [2020-10-23 18:44:04,531 INFO L270 CegarLoopResult]: At program point L100(line 100) the Hoare annotation is: false [2020-10-23 18:44:04,531 INFO L274 CegarLoopResult]: For program point L100-1(line 100) no Hoare annotation was computed. [2020-10-23 18:44:04,531 INFO L270 CegarLoopResult]: At program point L257(line 257) the Hoare annotation is: false [2020-10-23 18:44:04,531 INFO L274 CegarLoopResult]: For program point L257-1(line 257) no Hoare annotation was computed. [2020-10-23 18:44:04,531 INFO L274 CegarLoopResult]: For program point L191(lines 191 275) no Hoare annotation was computed. [2020-10-23 18:44:04,531 INFO L270 CegarLoopResult]: At program point L59(line 59) the Hoare annotation is: false [2020-10-23 18:44:04,531 INFO L274 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-10-23 18:44:04,531 INFO L274 CegarLoopResult]: For program point L175(lines 175 277) no Hoare annotation was computed. [2020-10-23 18:44:04,531 INFO L270 CegarLoopResult]: At program point L76(line 76) the Hoare annotation is: false [2020-10-23 18:44:04,532 INFO L274 CegarLoopResult]: For program point L76-1(line 76) no Hoare annotation was computed. [2020-10-23 18:44:04,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:04 BoogieIcfgContainer [2020-10-23 18:44:04,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:04,556 INFO L168 Benchmark]: Toolchain (without parser) took 11231.86 ms. Allocated memory was 151.0 MB in the beginning and 282.1 MB in the end (delta: 131.1 MB). Free memory was 126.4 MB in the beginning and 165.2 MB in the end (delta: -38.8 MB). Peak memory consumption was 157.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:04,556 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:04,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 114.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:04,558 INFO L168 Benchmark]: Boogie Preprocessor took 42.82 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:04,558 INFO L168 Benchmark]: RCFGBuilder took 707.65 ms. Allocated memory is still 151.0 MB. Free memory was 112.5 MB in the beginning and 122.9 MB in the end (delta: -10.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:04,559 INFO L168 Benchmark]: TraceAbstraction took 10109.54 ms. Allocated memory was 151.0 MB in the beginning and 282.1 MB in the end (delta: 131.1 MB). Free memory was 122.4 MB in the beginning and 165.2 MB in the end (delta: -42.8 MB). Peak memory consumption was 152.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:04,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 360.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 114.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.82 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 707.65 ms. Allocated memory is still 151.0 MB. Free memory was 112.5 MB in the beginning and 122.9 MB in the end (delta: -10.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10109.54 ms. Allocated memory was 151.0 MB in the beginning and 282.1 MB in the end (delta: 131.1 MB). Free memory was 122.4 MB in the beginning and 165.2 MB in the end (delta: -42.8 MB). Peak memory consumption was 152.7 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 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (((((0 <= main__i && main__j == 0) && main__i < main__len) && \old(__return_334) == __return_334) && main__limit + 4 <= main__bufsize) || ((1 <= main__j && (((((0 <= main__j && 1 <= main__i) && \old(__return_334) == __return_334) && !(__VERIFIER_assert__cond == 0)) && main__limit + 4 <= main__bufsize) || ((((0 <= main__j && 1 <= main__i) && main__j + 4 <= main__bufsize) && \old(__return_334) == __return_334) && main__limit + 4 <= main__bufsize))) && !(__VERIFIER_assert__cond == 0))) || ((1 <= main__j && (((((0 <= main__j && 1 <= main__i) && \old(__return_334) == __return_334) && !(__VERIFIER_assert__cond == 0)) && main__limit + 4 <= main__bufsize) || ((((0 <= main__j && 1 <= main__i) && main__j + 4 <= main__bufsize) && \old(__return_334) == __return_334) && main__limit + 4 <= main__bufsize))) && main__j + 4 <= main__bufsize) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((0 <= main__i && main__i < main__len) && 0 <= main__j) && main__j + 5 <= main__bufsize) && \old(__return_334) == __return_334) && main__limit + 4 <= main__bufsize - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (0 <= main__i && \old(__return_334) == __return_334) && main__limit + 4 <= main__bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 956 SDtfs, 1620 SDslu, 568 SDs, 0 SdLazy, 1624 SolverSat, 290 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 387 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 53 PreInvPairs, 72 NumberOfFragments, 210 HoareAnnotationTreeSize, 53 FomulaSimplifications, 3449650758 FormulaSimplificationTreeSizeReduction, 1.6s HoareSimplificationTime, 24 FomulaSimplificationsInter, 697078 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 310 NumberOfCodeBlocks, 310 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 24684 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...