/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/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:29:07,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:29:07,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:29:07,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:29:07,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:29:07,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:29:07,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:29:07,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:29:07,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:29:07,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:29:07,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:29:07,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:29:07,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:29:07,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:29:07,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:29:07,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:29:07,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:29:07,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:29:07,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:29:07,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:29:07,134 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:29:07,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:29:07,135 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:29:07,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:29:07,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:29:07,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:29:07,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:29:07,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:29:07,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:29:07,138 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:29:07,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:29:07,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:29:07,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:29:07,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:29:07,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:29:07,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:29:07,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:29:07,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:29:07,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:29:07,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:29:07,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:29:07,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:29:07,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:29:07,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:29:07,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:29:07,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:29:07,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:29:07,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:29:07,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:29:07,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:29:07,607 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:29:07,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2020-11-06 22:29:07,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817f9d673/3a0b0aa076794b3095e141aca91dcf98/FLAG9f70743f8 [2020-11-06 22:29:08,384 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:29:08,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c [2020-11-06 22:29:08,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817f9d673/3a0b0aa076794b3095e141aca91dcf98/FLAG9f70743f8 [2020-11-06 22:29:08,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817f9d673/3a0b0aa076794b3095e141aca91dcf98 [2020-11-06 22:29:08,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:29:08,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:29:08,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:08,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:29:08,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:29:08,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:08" (1/1) ... [2020-11-06 22:29:08,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5f405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:08, skipping insertion in model container [2020-11-06 22:29:08,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:08" (1/1) ... [2020-11-06 22:29:08,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:29:08,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:29:08,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:09,005 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:29:09,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:09,063 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:29:09,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09 WrapperNode [2020-11-06 22:29:09,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:09,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:29:09,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:29:09,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:29:09,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2020-11-06 22:29:09,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2020-11-06 22:29:09,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2020-11-06 22:29:09,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2020-11-06 22:29:09,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2020-11-06 22:29:09,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2020-11-06 22:29:09,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2020-11-06 22:29:09,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:29:09,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:29:09,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:29:09,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:29:09,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:29:09,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:29:09,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:29:09,245 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:29:09,245 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-06 22:29:09,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:29:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:29:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:29:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:29:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:29:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:29:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 22:29:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:29:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:29:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:29:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:29:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:29:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:29:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:29:09,640 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:29:09,640 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:29:09,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:09 BoogieIcfgContainer [2020-11-06 22:29:09,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:29:09,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:29:09,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:29:09,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:29:09,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:08" (1/3) ... [2020-11-06 22:29:09,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d56aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:09, skipping insertion in model container [2020-11-06 22:29:09,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (2/3) ... [2020-11-06 22:29:09,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d56aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:09, skipping insertion in model container [2020-11-06 22:29:09,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:09" (3/3) ... [2020-11-06 22:29:09,652 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-1.c [2020-11-06 22:29:09,671 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:29:09,675 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:29:09,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:29:09,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:29:09,765 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:29:09,765 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:29:09,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:29:09,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:29:09,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:29:09,766 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:29:09,766 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:29:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-06 22:29:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:29:09,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:09,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:09,809 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1364032089, now seen corresponding path program 1 times [2020-11-06 22:29:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:09,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49101943] [2020-11-06 22:29:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:29:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:10,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49101943] [2020-11-06 22:29:10,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:10,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:29:10,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128239831] [2020-11-06 22:29:10,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:29:10,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:10,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:29:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:29:10,158 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-11-06 22:29:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:10,234 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-06 22:29:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:29:10,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-06 22:29:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:10,243 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:29:10,244 INFO L226 Difference]: Without dead ends: 18 [2020-11-06 22:29:10,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:29:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-06 22:29:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-06 22:29:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:29:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-06 22:29:10,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-11-06 22:29:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:10,288 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-06 22:29:10,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:29:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-06 22:29:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:29:10,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:10,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:10,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:29:10,290 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 513696940, now seen corresponding path program 1 times [2020-11-06 22:29:10,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:10,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715568376] [2020-11-06 22:29:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:29:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:10,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715568376] [2020-11-06 22:29:10,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:10,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:29:10,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326217110] [2020-11-06 22:29:10,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:29:10,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:10,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:29:10,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:29:10,508 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2020-11-06 22:29:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:10,586 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-06 22:29:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:29:10,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-06 22:29:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:10,588 INFO L225 Difference]: With dead ends: 29 [2020-11-06 22:29:10,588 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:29:10,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:29:10,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:29:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:29:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:29:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-11-06 22:29:10,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-11-06 22:29:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:10,598 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-11-06 22:29:10,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:29:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-11-06 22:29:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:29:10,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:10,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:10,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:29:10,600 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash -983927919, now seen corresponding path program 1 times [2020-11-06 22:29:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:10,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767120745] [2020-11-06 22:29:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-06 22:29:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:10,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767120745] [2020-11-06 22:29:10,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528909203] [2020-11-06 22:29:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:29:10,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:11,008 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2020-11-06 22:29:11,009 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:11,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:11,023 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:29:11,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:83 [2020-11-06 22:29:11,117 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-11-06 22:29:11,119 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:11,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:11,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:29:11,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-11-06 22:29:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:11,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:11,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2020-11-06 22:29:11,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056352144] [2020-11-06 22:29:11,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:29:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:29:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:29:11,137 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-11-06 22:29:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:11,233 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-11-06 22:29:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:29:11,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-06 22:29:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:11,235 INFO L225 Difference]: With dead ends: 31 [2020-11-06 22:29:11,235 INFO L226 Difference]: Without dead ends: 22 [2020-11-06 22:29:11,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:29:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-06 22:29:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-06 22:29:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-06 22:29:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-11-06 22:29:11,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-11-06 22:29:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:11,243 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-11-06 22:29:11,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:29:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-11-06 22:29:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:29:11,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:11,244 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:11,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:29:11,458 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1387373258, now seen corresponding path program 2 times [2020-11-06 22:29:11,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:11,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522724301] [2020-11-06 22:29:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:11,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:11,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:29:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:11,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522724301] [2020-11-06 22:29:11,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6374236] [2020-11-06 22:29:11,715 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:11,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:29:11,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:11,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:29:11,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:11,836 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2020-11-06 22:29:11,837 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:11,852 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:11,854 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:29:11,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:83 [2020-11-06 22:29:11,940 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-11-06 22:29:11,942 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:11,948 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:11,948 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:29:11,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-11-06 22:29:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:11,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:11,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-11-06 22:29:11,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099490820] [2020-11-06 22:29:11,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:29:11,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:29:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:29:11,968 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-11-06 22:29:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:12,103 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-11-06 22:29:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:29:12,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-06 22:29:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:12,105 INFO L225 Difference]: With dead ends: 33 [2020-11-06 22:29:12,105 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:29:12,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:29:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:29:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-06 22:29:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-06 22:29:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-06 22:29:12,111 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-11-06 22:29:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:12,112 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-06 22:29:12,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:29:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-06 22:29:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:29:12,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:12,113 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:12,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:12,314 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1743679899, now seen corresponding path program 3 times [2020-11-06 22:29:12,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:12,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073872676] [2020-11-06 22:29:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:29:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:12,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073872676] [2020-11-06 22:29:12,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020588007] [2020-11-06 22:29:12,487 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:12,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:29:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-06 22:29:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:12,572 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2020-11-06 22:29:12,573 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:12,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:12,584 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:29:12,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-11-06 22:29:14,818 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#ad1~0.base_BEFORE_CALL_1| Int) (|v_main_~#ad1~0.offset_BEFORE_CALL_1| Int) (aux_div_main_~pa~0.offset_57 Int)) (= (+ |v_main_~#ad1~0.offset_BEFORE_CALL_1| (select (select |c_#memory_int| |v_main_~#ad1~0.base_BEFORE_CALL_1|) (+ |v_main_~#ad1~0.offset_BEFORE_CALL_1| (* (div (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| (- 8)) (* aux_div_main_~pa~0.offset_57 8)) 8) 8)))) aux_div_main_~pa~0.offset_57)) is different from true [2020-11-06 22:29:23,155 WARN L194 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-06 22:29:33,838 WARN L194 SmtUtils]: Spent 8.60 s on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-11-06 22:29:33,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:29:33,865 WARN L313 ript$VariableManager]: TermVariabe aux_div_main_~pa~0.offset_57 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-06 22:29:33,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:29:33,887 WARN L313 ript$VariableManager]: TermVariabe aux_div_main_~pa~0.offset_57 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-06 22:29:33,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:29:33,895 WARN L313 ript$VariableManager]: TermVariabe aux_div_main_~pa~0.offset_57 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-06 22:29:33,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:29:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:29:33,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:33,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-11-06 22:29:33,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343558633] [2020-11-06 22:29:33,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:29:33,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:29:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=228, Unknown=2, NotChecked=30, Total=306 [2020-11-06 22:29:33,970 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2020-11-06 22:29:34,453 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:29:34,776 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-11-06 22:29:35,944 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-11-06 22:29:40,270 WARN L194 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-06 22:29:50,429 WARN L194 SmtUtils]: Spent 8.09 s on a formula simplification that was a NOOP. DAG size: 65 [2020-11-06 22:29:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:50,572 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-11-06 22:29:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:29:50,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-11-06 22:29:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:50,573 INFO L225 Difference]: With dead ends: 32 [2020-11-06 22:29:50,573 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:29:50,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=165, Invalid=706, Unknown=3, NotChecked=56, Total=930 [2020-11-06 22:29:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:29:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:29:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:29:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:29:50,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-11-06 22:29:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:50,576 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:29:50,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:29:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:29:50,577 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:29:50,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:50,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:29:50,955 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:29:50,955 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:29:50,955 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:29:50,956 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:29:50,956 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:29:50,956 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:29:50,956 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:29:50,956 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:29:50,956 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:29:50,957 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:29:50,957 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:29:50,957 INFO L266 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-11-06 22:29:50,957 INFO L266 CegarLoopResult]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2020-11-06 22:29:50,957 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 16 40) no Hoare annotation was computed. [2020-11-06 22:29:50,957 INFO L266 CegarLoopResult]: For program point L23(lines 23 34) no Hoare annotation was computed. [2020-11-06 22:29:50,957 INFO L266 CegarLoopResult]: For program point L23-2(lines 23 34) no Hoare annotation was computed. [2020-11-06 22:29:50,958 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 16 40) no Hoare annotation was computed. [2020-11-06 22:29:50,958 INFO L266 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-11-06 22:29:50,958 INFO L262 CegarLoopResult]: At program point L32(lines 17 40) the Hoare annotation is: false [2020-11-06 22:29:50,958 INFO L262 CegarLoopResult]: At program point mainENTRY(lines 16 40) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-11-06 22:29:50,958 INFO L266 CegarLoopResult]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2020-11-06 22:29:50,958 INFO L262 CegarLoopResult]: At program point L28-3(lines 28 30) the Hoare annotation is: (and (= main_~pa~0.base |main_~#ad1~0.base|) (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (= (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8) 0) (< main_~i~0 (+ (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset) 1))) [2020-11-06 22:29:50,959 INFO L262 CegarLoopResult]: At program point L28-4(lines 28 30) the Hoare annotation is: (and (= main_~pa~0.base |main_~#ad1~0.base|) (= (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8) 0) (< main_~i~0 (+ (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset) 1)) (exists ((aux_div_main_~pa~0.offset_57 Int)) (let ((.cse1 (select |#memory_int| |main_~#ad1~0.base|)) (.cse2 (* aux_div_main_~pa~0.offset_57 8))) (let ((.cse0 (select .cse1 (+ (* |main_~#ad1~0.offset| (- 7)) .cse2)))) (and (< main_~i~0 (+ .cse0 1)) (= aux_div_main_~pa~0.offset_57 (+ (select .cse1 (+ (* (div (+ (* |main_~#ad1~0.offset| (- 8)) .cse2) 8) 8) |main_~#ad1~0.offset|)) |main_~#ad1~0.offset|)) (<= .cse0 main_~i~0))))) (= (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8) (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* (div (+ main_~pa~0.offset (- |main_~#ad1~0.offset|)) 8) 8) |main_~#ad1~0.offset|)))) [2020-11-06 22:29:50,959 INFO L269 CegarLoopResult]: At program point checkENTRY(lines 11 14) the Hoare annotation is: true [2020-11-06 22:29:50,959 INFO L266 CegarLoopResult]: For program point checkFINAL(lines 11 14) no Hoare annotation was computed. [2020-11-06 22:29:50,959 INFO L266 CegarLoopResult]: For program point checkEXIT(lines 11 14) no Hoare annotation was computed. [2020-11-06 22:29:50,970 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:50,971 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:50,976 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:50,977 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:50,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:29:50 BoogieIcfgContainer [2020-11-06 22:29:50,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:29:50,981 INFO L168 Benchmark]: Toolchain (without parser) took 42241.32 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 132.6 MB in the beginning and 106.2 MB in the end (delta: 26.5 MB). Peak memory consumption was 59.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:50,982 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 102.7 MB in the beginning and 102.7 MB in the end (delta: 63.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:29:50,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.61 ms. Allocated memory is still 156.2 MB. Free memory was 132.0 MB in the beginning and 122.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:50,984 INFO L168 Benchmark]: Boogie Preprocessor took 81.84 ms. Allocated memory is still 156.2 MB. Free memory was 122.2 MB in the beginning and 120.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:50,985 INFO L168 Benchmark]: RCFGBuilder took 492.92 ms. Allocated memory is still 156.2 MB. Free memory was 120.6 MB in the beginning and 135.6 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:50,986 INFO L168 Benchmark]: TraceAbstraction took 41335.54 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 135.2 MB in the beginning and 106.2 MB in the end (delta: 29.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:50,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 102.7 MB in the beginning and 102.7 MB in the end (delta: 63.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 314.61 ms. Allocated memory is still 156.2 MB. Free memory was 132.0 MB in the beginning and 122.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.84 ms. Allocated memory is still 156.2 MB. Free memory was 122.2 MB in the beginning and 120.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 492.92 ms. Allocated memory is still 156.2 MB. Free memory was 120.6 MB in the beginning and 135.6 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 41335.54 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 135.2 MB in the beginning and 106.2 MB in the end (delta: 29.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * 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 - InvariantResult [Line: 28]: Loop Invariant [2020-11-06 22:29:50,998 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:50,998 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:50,999 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:51,001 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((pa == ad1 && unknown-#memory_int-unknown[ad1][(pa + ad1 * -1) / 8 * 8 + ad1] == (pa + ad1 * -1) / 8) && (pa + ad1 * 7) % 8 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 41.0s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 17.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 33 SDslu, 162 SDs, 0 SdLazy, 274 SolverSat, 23 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 36.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 18 PreInvPairs, 23 NumberOfFragments, 183 HoareAnnotationTreeSize, 18 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 289 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 22.6s InterpolantComputationTime, 159 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 151 ConstructedInterpolants, 5 QuantifiedInterpolants, 21303 SizeOfPredicates, 25 NumberOfNonLiveVariables, 421 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 9/40 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...