/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:57:56,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:57:56,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:57:56,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:57:56,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:57:56,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:57:56,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:57:56,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:57:56,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:57:56,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:57:56,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:57:56,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:57:56,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:57:56,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:57:56,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:57:56,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:57:56,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:57:56,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:57:56,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:57:56,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:57:56,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:57:56,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:57:56,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:57:56,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:57:56,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:57:56,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:57:56,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:57:56,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:57:56,531 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 17:57:56,591 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:57:56,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:57:56,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:57:56,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:57:56,596 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:57:56,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:57:56,597 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:57:56,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:57:56,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:57:56,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:57:56,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:57:56,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:57:56,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:57:56,600 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:57:56,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:57:56,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:57:56,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:57:56,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:57:56,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:57:56,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:57:56,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:57:56,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:57:56,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:57:56,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:57:56,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:57:56,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:57:56,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:57:56,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:57:56,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:57:56,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:57:57,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:57:57,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:57:57,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:57:57,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:57:57,162 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:57:57,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-10-23 17:57:57,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8efc49c68/8ae3459b1afd4c3283dba2df50cbe64a/FLAG3dcb6f40f [2020-10-23 17:57:57,984 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:57:57,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-10-23 17:57:57,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8efc49c68/8ae3459b1afd4c3283dba2df50cbe64a/FLAG3dcb6f40f [2020-10-23 17:57:58,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8efc49c68/8ae3459b1afd4c3283dba2df50cbe64a [2020-10-23 17:57:58,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:57:58,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:57:58,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:58,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:57:58,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:57:58,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9d0f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58, skipping insertion in model container [2020-10-23 17:57:58,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:57:58,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:57:58,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:58,585 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:57:58,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:58,619 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:57:58,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58 WrapperNode [2020-10-23 17:57:58,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:58,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:57:58,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:57:58,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:57:58,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (1/1) ... [2020-10-23 17:57:58,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:57:58,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:57:58,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:57:58,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:57:58,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (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 17:57:58,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:57:58,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:57:58,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:57:58,739 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-10-23 17:57:58,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:57:58,739 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:57:58,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:57:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:57:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:57:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 17:57:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-10-23 17:57:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:57:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:57:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:57:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:57:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:57:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:57:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:57:58,981 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:57:58,981 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 17:57:58,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:58 BoogieIcfgContainer [2020-10-23 17:57:58,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:57:58,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:57:58,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:57:58,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:57:58,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:57:58" (1/3) ... [2020-10-23 17:57:58,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec04ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:58, skipping insertion in model container [2020-10-23 17:57:58,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:58" (2/3) ... [2020-10-23 17:57:58,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec04ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:58, skipping insertion in model container [2020-10-23 17:57:58,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:58" (3/3) ... [2020-10-23 17:57:58,993 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-10-23 17:57:59,005 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:57:59,010 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:57:59,026 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:57:59,055 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:57:59,056 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:57:59,056 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:57:59,056 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:57:59,056 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:57:59,056 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:57:59,056 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:57:59,057 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:57:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-23 17:57:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 17:57:59,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:59,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:59,084 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash -732444851, now seen corresponding path program 1 times [2020-10-23 17:57:59,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:59,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029199427] [2020-10-23 17:57:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:59,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:59,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:57:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:59,810 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 17:57:59,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029199427] [2020-10-23 17:57:59,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:59,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:57:59,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857382068] [2020-10-23 17:57:59,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:57:59,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:57:59,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:57:59,842 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-10-23 17:58:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:00,316 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-23 17:58:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:58:00,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-23 17:58:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:00,328 INFO L225 Difference]: With dead ends: 42 [2020-10-23 17:58:00,328 INFO L226 Difference]: Without dead ends: 24 [2020-10-23 17:58:00,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:58:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-23 17:58:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-23 17:58:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-23 17:58:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-23 17:58:00,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-23 17:58:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:00,386 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-23 17:58:00,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:58:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-23 17:58:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 17:58:00,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:00,388 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 17:58:00,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:58:00,389 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1245142590, now seen corresponding path program 1 times [2020-10-23 17:58:00,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:00,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6604208] [2020-10-23 17:58:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,620 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 17:58:00,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6604208] [2020-10-23 17:58:00,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:58:00,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:58:00,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23795307] [2020-10-23 17:58:00,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:58:00,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:58:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:58:00,631 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-10-23 17:58:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:00,943 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-23 17:58:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:58:00,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-23 17:58:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:00,946 INFO L225 Difference]: With dead ends: 31 [2020-10-23 17:58:00,946 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 17:58:00,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:58:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 17:58:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-23 17:58:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-23 17:58:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-23 17:58:00,957 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-10-23 17:58:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:00,958 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-23 17:58:00,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:58:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-23 17:58:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 17:58:00,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:00,960 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:00,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:58:00,960 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1261626143, now seen corresponding path program 1 times [2020-10-23 17:58:00,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:00,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306937653] [2020-10-23 17:58:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 17:58:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 17:58:01,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306937653] [2020-10-23 17:58:01,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072867199] [2020-10-23 17:58:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:58:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 17:58:01,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:01,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2020-10-23 17:58:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940075533] [2020-10-23 17:58:01,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 17:58:01,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 17:58:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:58:01,370 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 15 states. [2020-10-23 17:58:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:01,783 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-23 17:58:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 17:58:01,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-23 17:58:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:01,786 INFO L225 Difference]: With dead ends: 42 [2020-10-23 17:58:01,786 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 17:58:01,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-23 17:58:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 17:58:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 17:58:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 17:58:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-23 17:58:01,795 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 29 [2020-10-23 17:58:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:01,796 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-23 17:58:01,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 17:58:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-23 17:58:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 17:58:01,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:01,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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 17:58:02,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 17:58:02,014 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:02,016 INFO L82 PathProgramCache]: Analyzing trace with hash -391232570, now seen corresponding path program 1 times [2020-10-23 17:58:02,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:02,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113050416] [2020-10-23 17:58:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:02,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:02,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 17:58:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 17:58:02,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113050416] [2020-10-23 17:58:02,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553858559] [2020-10-23 17:58:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:02,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:58:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 17:58:02,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:02,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2020-10-23 17:58:02,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967076224] [2020-10-23 17:58:02,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 17:58:02,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:02,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 17:58:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-23 17:58:02,493 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 18 states. [2020-10-23 17:58:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:03,095 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-10-23 17:58:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 17:58:03,096 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-10-23 17:58:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:03,098 INFO L225 Difference]: With dead ends: 37 [2020-10-23 17:58:03,098 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 17:58:03,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-23 17:58:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 17:58:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-23 17:58:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 17:58:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2020-10-23 17:58:03,110 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 30 [2020-10-23 17:58:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:03,111 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-10-23 17:58:03,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 17:58:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2020-10-23 17:58:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 17:58:03,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:03,113 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:03,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:03,329 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:03,330 INFO L82 PathProgramCache]: Analyzing trace with hash -751727802, now seen corresponding path program 2 times [2020-10-23 17:58:03,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:03,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747932372] [2020-10-23 17:58:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 17:58:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 17:58:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-23 17:58:03,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747932372] [2020-10-23 17:58:03,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241769732] [2020-10-23 17:58:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:03,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:58:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 17:58:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 17:58:03,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:03,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-10-23 17:58:03,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658174531] [2020-10-23 17:58:03,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 17:58:03,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 17:58:03,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:58:03,804 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand 11 states. [2020-10-23 17:58:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:04,334 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2020-10-23 17:58:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:58:04,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-23 17:58:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:04,343 INFO L225 Difference]: With dead ends: 59 [2020-10-23 17:58:04,343 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 17:58:04,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:58:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 17:58:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-23 17:58:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 17:58:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-10-23 17:58:04,366 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 43 [2020-10-23 17:58:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:04,366 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-10-23 17:58:04,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 17:58:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-10-23 17:58:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 17:58:04,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:04,370 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:04,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:04,573 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:04,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1283743237, now seen corresponding path program 3 times [2020-10-23 17:58:04,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:04,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519122920] [2020-10-23 17:58:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:04,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:04,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:04,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:04,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:04,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 17:58:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 17:58:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:58:04,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519122920] [2020-10-23 17:58:04,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693803705] [2020-10-23 17:58:04,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:05,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 17:58:05,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:05,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-23 17:58:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:58:05,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:05,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-10-23 17:58:05,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107989196] [2020-10-23 17:58:05,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 17:58:05,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 17:58:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-23 17:58:05,357 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 22 states. [2020-10-23 17:58:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:06,775 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2020-10-23 17:58:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 17:58:06,778 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-10-23 17:58:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:06,779 INFO L225 Difference]: With dead ends: 47 [2020-10-23 17:58:06,779 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 17:58:06,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 17:58:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 17:58:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 17:58:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 17:58:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 17:58:06,786 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-10-23 17:58:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:06,786 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 17:58:06,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 17:58:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 17:58:06,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 17:58:06,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:06,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 17:58:07,357 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 16 [2020-10-23 17:58:07,507 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 17:58:07,507 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 17:58:07,507 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 17:58:07,507 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 17:58:07,508 INFO L274 CegarLoopResult]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2020-10-23 17:58:07,508 INFO L277 CegarLoopResult]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2020-10-23 17:58:07,508 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-10-23 17:58:07,508 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-10-23 17:58:07,508 INFO L270 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 3 fibonacci_~n) .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret7| 2))) (and (<= |fibonacci_#in~n| 2) .cse0 (<= 1 |fibonacci_#t~ret7|) (<= 2 |fibonacci_#in~n|)))) [2020-10-23 17:58:07,509 INFO L274 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-10-23 17:58:07,509 INFO L274 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-10-23 17:58:07,509 INFO L274 CegarLoopResult]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2020-10-23 17:58:07,509 INFO L274 CegarLoopResult]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-10-23 17:58:07,509 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:58:07,509 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)|) (= |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|)) [2020-10-23 17:58:07,509 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:58:07,510 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:58:07,510 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 17:58:07,510 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 17:58:07,510 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:58:07,510 INFO L274 CegarLoopResult]: For program point L33(lines 33 37) no Hoare annotation was computed. [2020-10-23 17:58:07,510 INFO L277 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-10-23 17:58:07,510 INFO L274 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-10-23 17:58:07,510 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 27 38) the Hoare annotation is: true [2020-10-23 17:58:07,511 INFO L274 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-10-23 17:58:07,511 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 27 38) no Hoare annotation was computed. [2020-10-23 17:58:07,511 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 27 38) no Hoare annotation was computed. [2020-10-23 17:58:07,511 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: false [2020-10-23 17:58:07,511 INFO L274 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-10-23 17:58:07,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:58:07 BoogieIcfgContainer [2020-10-23 17:58:07,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:58:07,519 INFO L168 Benchmark]: Toolchain (without parser) took 9155.04 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.0 MB in the beginning and 147.6 MB in the end (delta: -21.6 MB). Peak memory consumption was 118.9 MB. Max. memory is 8.0 GB. [2020-10-23 17:58:07,519 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:58:07,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.98 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:58:07,521 INFO L168 Benchmark]: Boogie Preprocessor took 34.85 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:58:07,522 INFO L168 Benchmark]: RCFGBuilder took 327.17 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:58:07,523 INFO L168 Benchmark]: TraceAbstraction took 8531.90 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.4 MB in the beginning and 147.6 MB in the end (delta: -46.2 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. [2020-10-23 17:58:07,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.98 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.85 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 327.17 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8531.90 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.4 MB in the beginning and 147.6 MB in the end (delta: -46.2 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 157 SDslu, 251 SDs, 0 SdLazy, 979 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 283 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 42 PreInvPairs, 57 NumberOfFragments, 71 HoareAnnotationTreeSize, 42 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 554 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 325 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 32674 SizeOfPredicates, 16 NumberOfNonLiveVariables, 566 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 164/244 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...