/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:06:45,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:06:45,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:06:45,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:06:45,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:06:45,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:06:45,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:06:45,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:06:45,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:06:45,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:06:45,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:06:45,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:06:45,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:06:45,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:06:45,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:06:45,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:06:45,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:06:45,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:06:45,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:06:45,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:06:45,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:06:45,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:06:45,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:06:45,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:06:45,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:06:45,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:06:45,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:06:45,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:06:45,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:06:45,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:06:45,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:06:45,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:06:45,659 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:06:45,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:06:45,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:06:45,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:06:45,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:06:45,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:06:45,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:06:45,661 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:06:45,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:06:45,661 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:06:45,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:06:45,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:06:45,662 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:06:45,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:06:45,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:06:45,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:06:45,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:06:45,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:06:45,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:06:45,663 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:06:46,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:06:46,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:06:46,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:06:46,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:06:46,151 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:06:46,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-11-07 05:06:46,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5664e85e/96abd6474dbd46bb97c6baa63b97af82/FLAGce860d101 [2020-11-07 05:06:46,869 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:06:46,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-11-07 05:06:46,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5664e85e/96abd6474dbd46bb97c6baa63b97af82/FLAGce860d101 [2020-11-07 05:06:47,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5664e85e/96abd6474dbd46bb97c6baa63b97af82 [2020-11-07 05:06:47,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:06:47,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:06:47,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:06:47,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:06:47,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:06:47,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ff99fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47, skipping insertion in model container [2020-11-07 05:06:47,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:06:47,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:06:47,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:06:47,634 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:06:47,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:06:47,678 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:06:47,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47 WrapperNode [2020-11-07 05:06:47,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:06:47,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:06:47,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:06:47,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:06:47,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... [2020-11-07 05:06:47,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:06:47,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:06:47,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:06:47,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:06:47,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:06:47,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:06:47,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:06:47,850 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:06:47,850 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-07 05:06:47,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:06:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 05:06:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:06:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:06:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:06:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:06:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-07 05:06:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:06:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:06:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:06:47,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:06:47,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:06:47,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:06:47,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:06:48,219 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:06:48,220 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 05:06:48,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:06:48 BoogieIcfgContainer [2020-11-07 05:06:48,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:06:48,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:06:48,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:06:48,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:06:48,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:06:47" (1/3) ... [2020-11-07 05:06:48,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac4684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:06:48, skipping insertion in model container [2020-11-07 05:06:48,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:06:47" (2/3) ... [2020-11-07 05:06:48,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac4684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:06:48, skipping insertion in model container [2020-11-07 05:06:48,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:06:48" (3/3) ... [2020-11-07 05:06:48,235 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-11-07 05:06:48,255 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:06:48,259 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:06:48,285 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:06:48,337 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:06:48,337 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:06:48,337 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:06:48,338 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:06:48,338 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:06:48,338 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:06:48,338 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:06:48,338 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:06:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-07 05:06:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 05:06:48,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:06:48,409 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] [2020-11-07 05:06:48,412 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:06:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:06:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash -891182369, now seen corresponding path program 1 times [2020-11-07 05:06:48,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:06:48,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729104868] [2020-11-07 05:06:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:06:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:48,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:06:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:49,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:06:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:06:49,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729104868] [2020-11-07 05:06:49,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:06:49,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:06:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398308286] [2020-11-07 05:06:49,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:06:49,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:06:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:06:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:06:49,143 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-11-07 05:06:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:06:49,582 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-07 05:06:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:06:49,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-11-07 05:06:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:06:49,598 INFO L225 Difference]: With dead ends: 53 [2020-11-07 05:06:49,599 INFO L226 Difference]: Without dead ends: 34 [2020-11-07 05:06:49,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 05:06:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-07 05:06:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-07 05:06:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 05:06:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-07 05:06:49,709 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-11-07 05:06:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:06:49,710 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-07 05:06:49,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:06:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-07 05:06:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 05:06:49,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:06:49,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:06:49,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:06:49,719 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:06:49,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:06:49,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1768365674, now seen corresponding path program 1 times [2020-11-07 05:06:49,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:06:49,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461148818] [2020-11-07 05:06:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:06:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:49,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:06:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:49,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:06:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:50,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 05:06:50,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461148818] [2020-11-07 05:06:50,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:06:50,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:06:50,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176494454] [2020-11-07 05:06:50,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:06:50,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:06:50,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:06:50,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:06:50,043 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-11-07 05:06:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:06:50,395 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-07 05:06:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:06:50,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-11-07 05:06:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:06:50,398 INFO L225 Difference]: With dead ends: 53 [2020-11-07 05:06:50,398 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 05:06:50,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 05:06:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 05:06:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-07 05:06:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 05:06:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-07 05:06:50,415 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-11-07 05:06:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:06:50,416 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-07 05:06:50,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:06:50,416 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-07 05:06:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 05:06:50,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:06:50,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:06:50,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:06:50,418 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:06:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:06:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1897653930, now seen corresponding path program 1 times [2020-11-07 05:06:50,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:06:50,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092058829] [2020-11-07 05:06:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:06:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:50,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:06:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:50,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:06:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:50,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 05:06:50,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092058829] [2020-11-07 05:06:50,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:06:50,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 05:06:50,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954412617] [2020-11-07 05:06:50,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 05:06:50,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:06:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 05:06:50,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 05:06:50,658 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2020-11-07 05:06:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:06:51,239 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-11-07 05:06:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 05:06:51,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-07 05:06:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:06:51,241 INFO L225 Difference]: With dead ends: 46 [2020-11-07 05:06:51,241 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 05:06:51,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 05:06:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 05:06:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-07 05:06:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-07 05:06:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-11-07 05:06:51,257 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2020-11-07 05:06:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:06:51,257 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-11-07 05:06:51,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 05:06:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-11-07 05:06:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 05:06:51,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:06:51,259 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:06:51,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:06:51,260 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:06:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:06:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -530753177, now seen corresponding path program 1 times [2020-11-07 05:06:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:06:51,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991941811] [2020-11-07 05:06:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:06:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:51,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:06:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:51,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:06:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:51,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:51,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 05:06:51,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991941811] [2020-11-07 05:06:51,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:06:51,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 05:06:51,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198347017] [2020-11-07 05:06:51,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 05:06:51,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:06:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 05:06:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 05:06:51,617 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-11-07 05:06:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:06:52,264 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-11-07 05:06:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 05:06:52,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-11-07 05:06:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:06:52,274 INFO L225 Difference]: With dead ends: 59 [2020-11-07 05:06:52,274 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 05:06:52,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-07 05:06:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 05:06:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-07 05:06:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 05:06:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-11-07 05:06:52,291 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 43 [2020-11-07 05:06:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:06:52,291 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-11-07 05:06:52,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 05:06:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-11-07 05:06:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 05:06:52,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:06:52,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:06:52,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:06:52,293 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:06:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:06:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash -660041433, now seen corresponding path program 2 times [2020-11-07 05:06:52,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:06:52,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986661347] [2020-11-07 05:06:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:06:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:52,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:06:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:52,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:06:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:52,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 05:06:52,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986661347] [2020-11-07 05:06:52,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:06:52,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 05:06:52,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768126025] [2020-11-07 05:06:52,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 05:06:52,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:06:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 05:06:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-07 05:06:52,614 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 12 states. [2020-11-07 05:06:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:06:53,489 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-11-07 05:06:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 05:06:53,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-11-07 05:06:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:06:53,492 INFO L225 Difference]: With dead ends: 54 [2020-11-07 05:06:53,493 INFO L226 Difference]: Without dead ends: 48 [2020-11-07 05:06:53,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-11-07 05:06:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-07 05:06:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-11-07 05:06:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 05:06:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-11-07 05:06:53,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-11-07 05:06:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:06:53,509 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-11-07 05:06:53,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 05:06:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-11-07 05:06:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 05:06:53,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:06:53,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:06:53,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 05:06:53,511 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:06:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:06:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1818492638, now seen corresponding path program 3 times [2020-11-07 05:06:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:06:53,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247794848] [2020-11-07 05:06:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:06:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:53,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:06:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:53,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:06:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:53,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:53,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:53,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 05:06:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:06:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-07 05:06:53,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247794848] [2020-11-07 05:06:53,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:06:53,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 05:06:53,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305003892] [2020-11-07 05:06:53,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 05:06:53,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:06:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 05:06:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-07 05:06:53,822 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-11-07 05:06:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:06:54,687 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-11-07 05:06:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 05:06:54,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-11-07 05:06:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:06:54,691 INFO L225 Difference]: With dead ends: 54 [2020-11-07 05:06:54,691 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 05:06:54,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2020-11-07 05:06:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 05:06:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 05:06:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 05:06:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 05:06:54,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-11-07 05:06:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:06:54,693 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 05:06:54,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 05:06:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 05:06:54,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 05:06:54,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 05:06:54,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 05:06:55,240 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2020-11-07 05:06:55,559 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-11-07 05:06:55,756 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-11-07 05:06:55,889 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-11-07 05:06:56,153 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 14 [2020-11-07 05:06:56,276 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2020-11-07 05:06:56,284 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,284 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,284 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,284 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,285 INFO L269 CegarLoopResult]: At program point L4-3(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,285 INFO L269 CegarLoopResult]: At program point L4-4(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,285 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 05:06:56,285 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 05:06:56,285 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,285 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-07 05:06:56,286 INFO L269 CegarLoopResult]: At program point L4(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,286 INFO L269 CegarLoopResult]: At program point L4-1(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,286 INFO L269 CegarLoopResult]: At program point L4-2(line 4) the Hoare annotation is: true [2020-11-07 05:06:56,286 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 05:06:56,286 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 05:06:56,287 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 05:06:56,287 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 05:06:56,287 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 05:06:56,287 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-11-07 05:06:56,287 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2020-11-07 05:06:56,287 INFO L262 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-11-07 05:06:56,288 INFO L262 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (and (<= main_~result~0 2) (< 0 (+ (div main_~result~0 4294967296) 1))) [2020-11-07 05:06:56,288 INFO L262 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: false [2020-11-07 05:06:56,288 INFO L269 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-11-07 05:06:56,288 INFO L269 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-11-07 05:06:56,288 INFO L262 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (or (and (<= 1 |main_#t~ret9|) (<= |main_#t~ret9| 1)) (and (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|)) (= |main_#t~ret9| 0)) [2020-11-07 05:06:56,288 INFO L269 CegarLoopResult]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2020-11-07 05:06:56,289 INFO L262 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= 1 |main_#t~ret9|) (<= main_~result~0 1) (<= |main_#t~ret9| 1) .cse0) (and (= main_~result~0 0) (= |main_#t~ret9| 0)) (and (<= main_~result~0 2) (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|) .cse0))) [2020-11-07 05:06:56,289 INFO L262 CegarLoopResult]: At program point idFINAL(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2020-11-07 05:06:56,289 INFO L262 CegarLoopResult]: At program point idEXIT(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2020-11-07 05:06:56,289 INFO L269 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-11-07 05:06:56,289 INFO L262 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-11-07 05:06:56,290 INFO L262 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-11-07 05:06:56,290 INFO L269 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-11-07 05:06:56,290 INFO L262 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) [2020-11-07 05:06:56,290 INFO L269 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-11-07 05:06:56,290 INFO L262 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: (or (and (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|)) (and (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= 0 |id_#t~ret7|) (<= |id_#t~ret7| 0))) [2020-11-07 05:06:56,290 INFO L269 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-11-07 05:06:56,290 INFO L262 CegarLoopResult]: At program point L8-2(line 8) the Hoare annotation is: (or (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= id_~ret~0 2) (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|) (<= 2 id_~ret~0)) (and (<= 0 |id_#t~ret7|) (<= id_~ret~0 1) (<= |id_#t~ret7| 0) (<= 1 id_~ret~0))) [2020-11-07 05:06:56,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:06:56 BoogieIcfgContainer [2020-11-07 05:06:56,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:06:56,312 INFO L168 Benchmark]: Toolchain (without parser) took 9047.20 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 129.6 MB in the beginning and 176.1 MB in the end (delta: -46.5 MB). Peak memory consumption was 127.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:06:56,312 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 153.1 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:06:56,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.52 ms. Allocated memory is still 153.1 MB. Free memory was 129.1 MB in the beginning and 120.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:06:56,314 INFO L168 Benchmark]: Boogie Preprocessor took 64.31 ms. Allocated memory is still 153.1 MB. Free memory was 120.0 MB in the beginning and 118.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:06:56,315 INFO L168 Benchmark]: RCFGBuilder took 473.19 ms. Allocated memory is still 153.1 MB. Free memory was 118.6 MB in the beginning and 135.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:06:56,316 INFO L168 Benchmark]: TraceAbstraction took 8084.85 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 135.2 MB in the beginning and 176.1 MB in the end (delta: -41.0 MB). Peak memory consumption was 131.5 MB. Max. memory is 8.0 GB. [2020-11-07 05:06:56,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 153.1 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 397.52 ms. Allocated memory is still 153.1 MB. Free memory was 129.1 MB in the beginning and 120.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.31 ms. Allocated memory is still 153.1 MB. Free memory was 120.0 MB in the beginning and 118.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 473.19 ms. Allocated memory is still 153.1 MB. Free memory was 118.6 MB in the beginning and 135.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8084.85 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 135.2 MB in the beginning and 176.1 MB in the end (delta: -41.0 MB). Peak memory consumption was 131.5 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 - ProcedureContractResult [Line: 4]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id: ((((ret <= 2 && 2 <= ret) || (3 <= ret && ret / 4294967296 <= 0)) || (((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret)) || (0 <= \result && \result <= 0)) && (((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (0 <= \result && \result <= 0)) || (2 <= \result && \result <= 2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 189 SDslu, 556 SDs, 0 SdLazy, 887 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 70 PreInvPairs, 130 NumberOfFragments, 374 HoareAnnotationTreeSize, 70 FomulaSimplifications, 6276 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 39 FomulaSimplificationsInter, 1398 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 231 NumberOfCodeBlocks, 231 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 225 ConstructedInterpolants, 0 QuantifiedInterpolants, 32895 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 47/80 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...