/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/modpf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:42:03,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:42:03,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:42:03,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:42:03,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:42:03,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:42:03,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:42:03,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:42:03,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:42:03,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:42:03,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:42:03,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:42:03,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:42:03,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:42:03,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:42:03,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:42:03,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:42:03,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:42:03,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:42:03,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:42:03,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:42:03,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:42:03,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:42:03,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:42:03,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:42:03,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:42:03,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:42:03,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:42:03,842 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 18:42:03,907 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:42:03,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:42:03,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:42:03,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:42:03,914 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:42:03,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:42:03,914 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:42:03,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:42:03,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:42:03,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:42:03,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:42:03,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:42:03,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:42:03,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:42:03,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:42:03,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:42:03,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:42:03,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:42:03,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:42:03,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:42:03,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:42:03,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:42:03,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:42:03,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:42:03,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:42:03,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:42:03,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:42:03,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:42:03,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:42:03,919 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:42:04,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:42:04,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:42:04,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:42:04,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:42:04,433 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:42:04,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modpf.c [2020-10-23 18:42:04,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d97b6a5/c4eec8b5715747d7a338a8b1d76691c3/FLAG419c9a0a8 [2020-10-23 18:42:05,280 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:42:05,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modpf.c [2020-10-23 18:42:05,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d97b6a5/c4eec8b5715747d7a338a8b1d76691c3/FLAG419c9a0a8 [2020-10-23 18:42:05,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d97b6a5/c4eec8b5715747d7a338a8b1d76691c3 [2020-10-23 18:42:05,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:42:05,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:42:05,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:05,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:42:05,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:42:05,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f039a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05, skipping insertion in model container [2020-10-23 18:42:05,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:42:05,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:42:05,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:05,976 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:42:06,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:06,047 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:42:06,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06 WrapperNode [2020-10-23 18:42:06,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:06,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:42:06,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:42:06,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:42:06,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (1/1) ... [2020-10-23 18:42:06,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (1/1) ... [2020-10-23 18:42:06,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (1/1) ... [2020-10-23 18:42:06,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (1/1) ... [2020-10-23 18:42:06,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (1/1) ... [2020-10-23 18:42:06,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (1/1) ... [2020-10-23 18:42:06,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (1/1) ... [2020-10-23 18:42:06,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:42:06,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:42:06,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:42:06,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:42:06,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (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 18:42:06,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:42:06,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:42:06,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:42:06,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:42:06,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:42:06,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:42:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:42:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:42:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:42:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:42:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:42:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:42:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:42:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:42:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:42:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:42:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:42:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:42:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:42:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:42:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:42:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:42:06,770 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:42:06,770 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:42:06,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:06 BoogieIcfgContainer [2020-10-23 18:42:06,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:42:06,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:42:06,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:42:06,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:42:06,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:42:05" (1/3) ... [2020-10-23 18:42:06,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6ac5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:06, skipping insertion in model container [2020-10-23 18:42:06,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:06" (2/3) ... [2020-10-23 18:42:06,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6ac5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:06, skipping insertion in model container [2020-10-23 18:42:06,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:06" (3/3) ... [2020-10-23 18:42:06,782 INFO L111 eAbstractionObserver]: Analyzing ICFG modpf.c [2020-10-23 18:42:06,796 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:42:06,802 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:42:06,819 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:42:06,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:42:06,853 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:42:06,853 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:42:06,853 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:42:06,853 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:42:06,854 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:42:06,854 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:42:06,854 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:42:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:42:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:42:06,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:06,882 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 18:42:06,883 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:06,890 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-10-23 18:42:06,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:06,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848787651] [2020-10-23 18:42:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:07,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:07,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:07,227 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 18:42:07,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848787651] [2020-10-23 18:42:07,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:07,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:42:07,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317849690] [2020-10-23 18:42:07,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:42:07,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:42:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:42:07,256 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-23 18:42:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:07,412 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-10-23 18:42:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:42:07,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 18:42:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:07,427 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:42:07,427 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:42:07,431 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 18:42:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:42:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:42:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:42:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-23 18:42:07,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-23 18:42:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:07,480 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-23 18:42:07,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:42:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-23 18:42:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:42:07,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:07,482 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 18:42:07,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:42:07,483 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:07,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1402688601, now seen corresponding path program 1 times [2020-10-23 18:42:07,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:07,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115077841] [2020-10-23 18:42:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:07,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:07,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650872054] [2020-10-23 18:42:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:42:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:07,741 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 18:42:07,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115077841] [2020-10-23 18:42:07,742 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:07,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650872054] [2020-10-23 18:42:07,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:07,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:42:07,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268764027] [2020-10-23 18:42:07,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:42:07,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:07,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:42:07,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:42:07,747 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2020-10-23 18:42:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:07,862 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-23 18:42:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:42:07,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:42:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:07,865 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:42:07,866 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:42:07,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:42:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:42:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-23 18:42:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:42:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-23 18:42:07,883 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-23 18:42:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:07,883 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-23 18:42:07,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:42:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-23 18:42:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:42:07,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:07,885 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] [2020-10-23 18:42:08,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:42:08,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-10-23 18:42:08,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:08,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591681853] [2020-10-23 18:42:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:08,159 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:08,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599657442] [2020-10-23 18:42:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:42:08,253 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:42:08,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:08,368 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:42:08,368 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:42:08,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:08,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:42:08 BoogieIcfgContainer [2020-10-23 18:42:08,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:42:08,652 INFO L168 Benchmark]: Toolchain (without parser) took 2985.75 ms. Allocated memory is still 160.4 MB. Free memory was 136.3 MB in the beginning and 67.3 MB in the end (delta: 69.0 MB). Peak memory consumption was 70.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:08,653 INFO L168 Benchmark]: CDTParser took 1.56 ms. Allocated memory is still 160.4 MB. Free memory is still 132.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:42:08,656 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.85 ms. Allocated memory is still 160.4 MB. Free memory was 135.7 MB in the beginning and 125.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:08,659 INFO L168 Benchmark]: Boogie Preprocessor took 93.01 ms. Allocated memory is still 160.4 MB. Free memory was 125.6 MB in the beginning and 124.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:08,661 INFO L168 Benchmark]: RCFGBuilder took 626.44 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 142.8 MB in the end (delta: -18.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:08,662 INFO L168 Benchmark]: TraceAbstraction took 1873.97 ms. Allocated memory is still 160.4 MB. Free memory was 142.8 MB in the beginning and 67.3 MB in the end (delta: 75.5 MB). Peak memory consumption was 75.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:08,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.56 ms. Allocated memory is still 160.4 MB. Free memory is still 132.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 373.85 ms. Allocated memory is still 160.4 MB. Free memory was 135.7 MB in the beginning and 125.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 93.01 ms. Allocated memory is still 160.4 MB. Free memory was 125.6 MB in the beginning and 124.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 626.44 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 142.8 MB in the end (delta: -18.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1873.97 ms. Allocated memory is still 160.4 MB. Free memory was 142.8 MB in the beginning and 67.3 MB in the end (delta: 75.5 MB). Peak memory consumption was 75.5 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)=10, 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={3:0}] [L32] COND TRUE i