/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/array-fpi/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:16,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:16,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:16,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:16,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:16,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:16,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:16,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:16,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:16,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:16,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:16,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:44:16,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:44:16,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:44:16,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:44:16,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:44:16,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:44:16,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:44:16,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:44:16,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:44:16,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:44:16,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:44:16,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:44:16,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:44:16,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:44:16,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:16,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:16,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:16,175 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 22:44:16,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:16,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:16,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:16,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:16,240 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:16,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:16,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:16,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:16,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:16,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:16,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:16,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:16,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:16,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:16,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:16,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:16,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:16,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:16,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:16,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:16,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:16,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:16,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:16,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:16,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:16,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:16,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:16,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:16,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:16,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:16,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:16,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:16,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:16,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:16,711 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:16,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2020-11-06 22:44:16,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60b7f171f/0f343ae54c1d454fb6e30e9303434abe/FLAG28f266627 [2020-11-06 22:44:17,364 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:17,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c [2020-11-06 22:44:17,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60b7f171f/0f343ae54c1d454fb6e30e9303434abe/FLAG28f266627 [2020-11-06 22:44:17,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60b7f171f/0f343ae54c1d454fb6e30e9303434abe [2020-11-06 22:44:17,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:17,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:17,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:17,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:17,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:17,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:17" (1/1) ... [2020-11-06 22:44:17,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757308c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:17, skipping insertion in model container [2020-11-06 22:44:17,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:17" (1/1) ... [2020-11-06 22:44:17,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:17,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:18,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:18,075 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:18,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:18,141 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:18,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18 WrapperNode [2020-11-06 22:44:18,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:18,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:18,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:18,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:18,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (1/1) ... [2020-11-06 22:44:18,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (1/1) ... [2020-11-06 22:44:18,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (1/1) ... [2020-11-06 22:44:18,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (1/1) ... [2020-11-06 22:44:18,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (1/1) ... [2020-11-06 22:44:18,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (1/1) ... [2020-11-06 22:44:18,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (1/1) ... [2020-11-06 22:44:18,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:18,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:18,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:18,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:18,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (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 22:44:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:44:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:44:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:18,849 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:18,850 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:44:18,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:18 BoogieIcfgContainer [2020-11-06 22:44:18,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:18,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:18,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:18,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:18,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:17" (1/3) ... [2020-11-06 22:44:18,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16667f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:18, skipping insertion in model container [2020-11-06 22:44:18,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:18" (2/3) ... [2020-11-06 22:44:18,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16667f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:18, skipping insertion in model container [2020-11-06 22:44:18,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:18" (3/3) ... [2020-11-06 22:44:18,881 INFO L111 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-11-06 22:44:18,898 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:18,902 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:18,918 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:18,947 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:18,948 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:18,948 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:18,948 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:18,948 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:18,948 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:18,948 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:18,949 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-06 22:44:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:18,975 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:18,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:18,977 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-11-06 22:44:18,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:18,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739526258] [2020-11-06 22:44:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:19,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:19,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:19,310 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 22:44:19,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739526258] [2020-11-06 22:44:19,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:19,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:44:19,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034710629] [2020-11-06 22:44:19,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:44:19,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:19,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:44:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:19,337 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-11-06 22:44:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:19,508 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-11-06 22:44:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:44:19,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-06 22:44:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:19,519 INFO L225 Difference]: With dead ends: 63 [2020-11-06 22:44:19,519 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:44:19,523 INFO L677 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 [2020-11-06 22:44:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:44:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:44:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:44:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-06 22:44:19,569 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-11-06 22:44:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:19,569 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-06 22:44:19,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:44:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-06 22:44:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:19,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:19,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:19,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:44:19,571 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:19,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1402688601, now seen corresponding path program 1 times [2020-11-06 22:44:19,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:19,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035832561] [2020-11-06 22:44:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:19,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:19,768 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 22:44:19,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035832561] [2020-11-06 22:44:19,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:19,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:44:19,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549368327] [2020-11-06 22:44:19,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:19,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:19,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:19,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:19,773 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-11-06 22:44:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:19,970 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-11-06 22:44:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:44:19,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-06 22:44:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:19,973 INFO L225 Difference]: With dead ends: 53 [2020-11-06 22:44:19,974 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:44:19,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:44:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:44:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-11-06 22:44:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:44:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-06 22:44:19,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-11-06 22:44:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:19,989 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-06 22:44:19,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-06 22:44:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:44:19,991 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:19,991 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] [2020-11-06 22:44:19,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:44:19,991 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-11-06 22:44:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:19,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601640165] [2020-11-06 22:44:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:20,017 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:20,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447858300] [2020-11-06 22:44:20,017 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 22:44:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:20,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:20,130 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:20,165 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:44:20,165 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:44:20,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:44:20,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:44:20 BoogieIcfgContainer [2020-11-06 22:44:20,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:44:20,448 INFO L168 Benchmark]: Toolchain (without parser) took 2682.99 ms. Allocated memory is still 158.3 MB. Free memory was 133.9 MB in the beginning and 97.7 MB in the end (delta: 36.3 MB). Peak memory consumption was 37.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:20,450 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 100.8 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:20,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.16 ms. Allocated memory is still 158.3 MB. Free memory was 133.3 MB in the beginning and 123.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:20,453 INFO L168 Benchmark]: Boogie Preprocessor took 95.54 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 121.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:20,456 INFO L168 Benchmark]: RCFGBuilder took 610.51 ms. Allocated memory is still 158.3 MB. Free memory was 121.5 MB in the beginning and 138.3 MB in the end (delta: -16.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:20,458 INFO L168 Benchmark]: TraceAbstraction took 1584.39 ms. Allocated memory is still 158.3 MB. Free memory was 137.8 MB in the beginning and 97.7 MB in the end (delta: 40.2 MB). Peak memory consumption was 41.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:20,466 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 100.8 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 373.16 ms. Allocated memory is still 158.3 MB. Free memory was 133.3 MB in the beginning and 123.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 95.54 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 121.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 610.51 ms. Allocated memory is still 158.3 MB. Free memory was 121.5 MB in the beginning and 138.3 MB in the end (delta: -16.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1584.39 ms. Allocated memory is still 158.3 MB. Free memory was 137.8 MB in the beginning and 97.7 MB in the end (delta: 40.2 MB). Peak memory consumption was 41.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=14, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L32] COND TRUE i