/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:31:41,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:31:41,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:31:41,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:31:41,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:31:41,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:31:41,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:31:41,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:31:41,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:31:41,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:31:41,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:31:41,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:31:41,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:31:41,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:31:41,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:31:41,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:31:41,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:31:41,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:31:41,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:31:41,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:31:41,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:31:41,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:31:41,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:31:41,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:31:41,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:31:41,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:31:41,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:31:41,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:31:41,968 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 [2020-07-07 11:31:42,002 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:31:42,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:31:42,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:31:42,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:31:42,004 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:31:42,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:31:42,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:31:42,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:31:42,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:31:42,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:31:42,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:31:42,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:31:42,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:31:42,007 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:31:42,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:31:42,007 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:31:42,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:31:42,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:31:42,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:31:42,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:31:42,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:31:42,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:31:42,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:31:42,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:31:42,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:31:42,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:31:42,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:31:42,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:31:42,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:31:42,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:31:42,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:31:42,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:31:42,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:31:42,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:31:42,282 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:31:42,283 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-07 11:31:42,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd92520ec/3004dc1fe4d84ecbb1984f5631a0ffe2/FLAG7b7f58430 [2020-07-07 11:31:42,830 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:31:42,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-07 11:31:42,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd92520ec/3004dc1fe4d84ecbb1984f5631a0ffe2/FLAG7b7f58430 [2020-07-07 11:31:43,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd92520ec/3004dc1fe4d84ecbb1984f5631a0ffe2 [2020-07-07 11:31:43,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:31:43,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:31:43,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:43,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:31:43,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:31:43,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67004283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43, skipping insertion in model container [2020-07-07 11:31:43,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:31:43,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:31:43,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:43,510 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:31:43,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:43,641 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:31:43,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43 WrapperNode [2020-07-07 11:31:43,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:43,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:31:43,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:31:43,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:31:43,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (1/1) ... [2020-07-07 11:31:43,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:31:43,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:31:43,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:31:43,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:31:43,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (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 [2020-07-07 11:31:43,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:31:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:31:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:31:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:31:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:31:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:31:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:31:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:31:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:31:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:31:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:31:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:31:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:31:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:31:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:31:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:31:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:31:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:31:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:31:44,146 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:31:44,146 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 11:31:44,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:44 BoogieIcfgContainer [2020-07-07 11:31:44,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:31:44,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:31:44,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:31:44,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:31:44,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:31:43" (1/3) ... [2020-07-07 11:31:44,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a71b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:44, skipping insertion in model container [2020-07-07 11:31:44,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:43" (2/3) ... [2020-07-07 11:31:44,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a71b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:44, skipping insertion in model container [2020-07-07 11:31:44,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:44" (3/3) ... [2020-07-07 11:31:44,157 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-07-07 11:31:44,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:31:44,175 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:31:44,189 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:31:44,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:31:44,212 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:31:44,212 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:31:44,212 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:31:44,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:31:44,213 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:31:44,213 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:31:44,213 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:31:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-07 11:31:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:31:44,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:44,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:44,235 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-07 11:31:44,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:44,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524368676] [2020-07-07 11:31:44,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:44,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524368676] [2020-07-07 11:31:44,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:44,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:31:44,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427703862] [2020-07-07 11:31:44,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:31:44,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:44,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:31:44,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:44,476 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-07-07 11:31:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:44,584 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-07 11:31:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:31:44,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-07 11:31:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:44,595 INFO L225 Difference]: With dead ends: 56 [2020-07-07 11:31:44,595 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 11:31:44,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 11:31:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-07 11:31:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-07 11:31:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-07 11:31:44,641 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-07-07 11:31:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:44,642 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-07 11:31:44,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:31:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-07 11:31:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:31:44,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:44,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:44,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:31:44,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-07 11:31:44,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:44,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304326303] [2020-07-07 11:31:44,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:44,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304326303] [2020-07-07 11:31:44,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:44,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:31:44,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916520748] [2020-07-07 11:31:44,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:31:44,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:44,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:31:44,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:31:44,770 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-07-07 11:31:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:44,889 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-07 11:31:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:31:44,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-07 11:31:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:44,892 INFO L225 Difference]: With dead ends: 45 [2020-07-07 11:31:44,892 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 11:31:44,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:31:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 11:31:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-07 11:31:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:31:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-07 11:31:44,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-07-07 11:31:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:44,902 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-07 11:31:44,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:31:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-07 11:31:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:31:44,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:44,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:44,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:31:44,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:44,904 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-07 11:31:44,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:44,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61018214] [2020-07-07 11:31:44,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:31:45,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61018214] [2020-07-07 11:31:45,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:45,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 11:31:45,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798601164] [2020-07-07 11:31:45,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:31:45,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:31:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:45,056 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-07-07 11:31:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:45,282 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-07 11:31:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:31:45,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-07 11:31:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:45,284 INFO L225 Difference]: With dead ends: 39 [2020-07-07 11:31:45,284 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:31:45,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:31:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:31:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-07 11:31:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:31:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-07 11:31:45,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-07 11:31:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:45,293 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-07 11:31:45,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:31:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-07 11:31:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:31:45,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:45,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:45,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:31:45,295 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-07 11:31:45,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:45,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937160478] [2020-07-07 11:31:45,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:45,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937160478] [2020-07-07 11:31:45,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124745322] [2020-07-07 11:31:45,397 INFO L94 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 [2020-07-07 11:31:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:31:45,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:45,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:45,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:31:45,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841503830] [2020-07-07 11:31:45,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:31:45,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:45,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:31:45,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:31:45,519 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2020-07-07 11:31:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:45,680 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-07-07 11:31:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:31:45,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-07 11:31:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:45,682 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:31:45,682 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:31:45,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:31:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:31:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-07 11:31:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-07 11:31:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-07 11:31:45,690 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-07 11:31:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:45,690 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-07 11:31:45,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:31:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-07 11:31:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 11:31:45,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:45,692 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:45,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:45,908 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-07 11:31:45,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:45,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492882710] [2020-07-07 11:31:45,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:46,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492882710] [2020-07-07 11:31:46,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712681586] [2020-07-07 11:31:46,289 INFO L94 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 [2020-07-07 11:31:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 11:31:46,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:46,462 INFO L384 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 13 treesize of output 9 [2020-07-07 11:31:46,463 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:46,476 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:46,476 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:46,477 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-07-07 11:31:46,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:46,543 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-07-07 11:31:46,544 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:46,554 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:46,554 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:46,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-07-07 11:31:46,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:46,636 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 25 [2020-07-07 11:31:46,637 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:46,646 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:46,648 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-07 11:31:46,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2020-07-07 11:31:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:46,846 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-07-07 11:31:46,847 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:46,854 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:46,855 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:46,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:36, output treesize:7 [2020-07-07 11:31:46,882 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:46,886 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:46,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:46,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2020-07-07 11:31:46,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230718405] [2020-07-07 11:31:46,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 11:31:46,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 11:31:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:31:46,939 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 25 states. [2020-07-07 11:31:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:47,499 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-07-07 11:31:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:31:47,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-07-07 11:31:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:47,501 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:31:47,501 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 11:31:47,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:31:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 11:31:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-07 11:31:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 11:31:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-07 11:31:47,518 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-07-07 11:31:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:47,518 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-07 11:31:47,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 11:31:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-07 11:31:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 11:31:47,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:47,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:47,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:47,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:47,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-07-07 11:31:47,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:47,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017379352] [2020-07-07 11:31:47,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:47,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017379352] [2020-07-07 11:31:47,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273610484] [2020-07-07 11:31:47,827 INFO L92 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 [2020-07-07 11:31:47,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:31:47,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:47,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:31:47,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:47,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:47,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-07-07 11:31:47,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903223251] [2020-07-07 11:31:47,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:31:47,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:31:47,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:31:47,946 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 14 states. [2020-07-07 11:31:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:48,185 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-07-07 11:31:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:31:48,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-07 11:31:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:48,187 INFO L225 Difference]: With dead ends: 66 [2020-07-07 11:31:48,187 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 11:31:48,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:31:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 11:31:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-07-07 11:31:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:31:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-07 11:31:48,194 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-07-07 11:31:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:48,195 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-07 11:31:48,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:31:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-07 11:31:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 11:31:48,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:48,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:48,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:48,412 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-07-07 11:31:48,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:48,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948504932] [2020-07-07 11:31:48,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:31:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:31:48,521 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:31:48,521 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:31:48,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:31:48,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:31:48 BoogieIcfgContainer [2020-07-07 11:31:48,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:31:48,564 INFO L168 Benchmark]: Toolchain (without parser) took 5315.75 ms. Allocated memory was 146.8 MB in the beginning and 245.9 MB in the end (delta: 99.1 MB). Free memory was 103.1 MB in the beginning and 135.2 MB in the end (delta: -32.1 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,565 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.64 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 102.9 MB in the beginning and 183.5 MB in the end (delta: -80.6 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,566 INFO L168 Benchmark]: Boogie Preprocessor took 42.39 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 181.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,567 INFO L168 Benchmark]: RCFGBuilder took 464.87 ms. Allocated memory is still 204.5 MB. Free memory was 181.3 MB in the beginning and 164.6 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,568 INFO L168 Benchmark]: TraceAbstraction took 4411.12 ms. Allocated memory was 204.5 MB in the beginning and 245.9 MB in the end (delta: 41.4 MB). Free memory was 164.0 MB in the beginning and 135.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 70.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,571 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 392.64 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 102.9 MB in the beginning and 183.5 MB in the end (delta: -80.6 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.39 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 181.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 464.87 ms. Allocated memory is still 204.5 MB. Free memory was 181.3 MB in the beginning and 164.6 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4411.12 ms. Allocated memory was 204.5 MB in the beginning and 245.9 MB in the end (delta: 41.4 MB). Free memory was 164.0 MB in the beginning and 135.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 70.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=22, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=3, sum={2:0}] [L29] COND TRUE i