/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/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:47,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:47,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:47,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:47,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:47,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:47,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:47,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:47,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:47,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:47,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:47,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:41:47,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:47,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:47,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:47,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:47,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:47,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:47,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:47,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:47,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:47,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:47,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:47,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:47,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:41:47,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:47,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:47,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:47,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:41:47,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:47,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:47,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:47,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:47,321 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:47,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:47,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:47,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:47,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:47,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:47,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:47,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:47,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:47,324 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:47,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:47,325 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:47,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:47,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:47,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:47,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:47,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:47,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:47,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:47,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:47,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:47,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:47,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:47,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:47,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:47,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:47,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:47,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:47,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:47,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:47,786 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:47,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-10-23 18:41:47,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8034c14a9/efccc8373fde421dba326ffd563f8ee7/FLAG7eee81b5a [2020-10-23 18:41:48,534 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:48,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condnf.c [2020-10-23 18:41:48,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8034c14a9/efccc8373fde421dba326ffd563f8ee7/FLAG7eee81b5a [2020-10-23 18:41:48,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8034c14a9/efccc8373fde421dba326ffd563f8ee7 [2020-10-23 18:41:48,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:48,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:48,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:48,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:48,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:48,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:48" (1/1) ... [2020-10-23 18:41:48,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e66967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:48, skipping insertion in model container [2020-10-23 18:41:48,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:48" (1/1) ... [2020-10-23 18:41:48,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:48,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:49,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:49,163 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:49,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:49,202 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:49,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49 WrapperNode [2020-10-23 18:41:49,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:49,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:49,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:49,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:49,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:49,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:49,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:49,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:49,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:49,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:49,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:49,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:49,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:41:49,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:41:49,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:49,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:49,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:49,317 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:49,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:49,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:41:49,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:41:49,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:49,318 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:41:49,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:41:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:49,867 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:49,867 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:41:49,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:49 BoogieIcfgContainer [2020-10-23 18:41:49,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:49,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:49,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:49,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:49,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:48" (1/3) ... [2020-10-23 18:41:49,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7a165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:49, skipping insertion in model container [2020-10-23 18:41:49,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (2/3) ... [2020-10-23 18:41:49,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7a165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:49, skipping insertion in model container [2020-10-23 18:41:49,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:49" (3/3) ... [2020-10-23 18:41:49,887 INFO L111 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-10-23 18:41:49,902 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:49,909 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:49,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:49,971 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:49,971 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:49,972 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:49,972 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:49,972 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:49,972 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:49,972 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:49,972 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-23 18:41:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:50,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:50,005 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] [2020-10-23 18:41:50,006 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash -603566119, now seen corresponding path program 1 times [2020-10-23 18:41:50,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:50,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662445574] [2020-10-23 18:41:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:50,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662445574] [2020-10-23 18:41:50,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:50,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940918554] [2020-10-23 18:41:50,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:50,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:50,457 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-23 18:41:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:50,585 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-23 18:41:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:50,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 18:41:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:50,596 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:41:50,596 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 18:41:50,600 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 [2020-10-23 18:41:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 18:41:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-23 18:41:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:41:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-23 18:41:50,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-23 18:41:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:50,649 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-23 18:41:50,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-23 18:41:50,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:50,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:50,651 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] [2020-10-23 18:41:50,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:41:50,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash 689239426, now seen corresponding path program 1 times [2020-10-23 18:41:50,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:50,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041228735] [2020-10-23 18:41:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:50,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041228735] [2020-10-23 18:41:50,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:50,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:41:50,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290364867] [2020-10-23 18:41:50,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:50,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:50,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:50,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:50,797 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-10-23 18:41:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:50,998 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-23 18:41:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:41:50,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-23 18:41:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:51,002 INFO L225 Difference]: With dead ends: 56 [2020-10-23 18:41:51,002 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 18:41:51,004 INFO L677 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 [2020-10-23 18:41:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 18:41:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-10-23 18:41:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:41:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-23 18:41:51,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-23 18:41:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:51,019 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-23 18:41:51,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-23 18:41:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:41:51,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:51,021 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, 1] [2020-10-23 18:41:51,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:41:51,022 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash 493588519, now seen corresponding path program 1 times [2020-10-23 18:41:51,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:51,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809981533] [2020-10-23 18:41:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:51,096 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:51,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:51,228 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:41:51,229 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:41:51,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:41:51,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:41:51 BoogieIcfgContainer [2020-10-23 18:41:51,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:41:51,294 INFO L168 Benchmark]: Toolchain (without parser) took 2402.00 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 58.2 MB in the end (delta: 68.0 MB). Peak memory consumption was 68.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:51,295 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:41:51,296 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.17 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 116.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:51,297 INFO L168 Benchmark]: Boogie Preprocessor took 38.19 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:51,298 INFO L168 Benchmark]: RCFGBuilder took 628.12 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 131.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:51,299 INFO L168 Benchmark]: TraceAbstraction took 1414.90 ms. Allocated memory is still 151.0 MB. Free memory was 130.6 MB in the beginning and 58.2 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:51,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 301.17 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 116.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.19 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 628.12 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 131.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1414.90 ms. Allocated memory is still 151.0 MB. Free memory was 130.6 MB in the beginning and 58.2 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 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)=51, 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 *a = malloc(sizeof(int)*N); [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L30] COND TRUE i N [L38] EXPR a[i] [L38] a[i] = a[i] [L35] i++ VAL [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1] [L35] COND FALSE !(i