/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/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:42:29,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:42:29,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:42:29,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:42:29,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:42:29,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:42:29,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:42:29,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:42:29,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:42:29,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:42:29,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:42:29,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:42:29,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:42:29,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:42:29,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:42:29,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:42:29,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:42:29,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:42:29,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:42:29,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:42:29,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:42:29,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:42:29,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:42:29,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:42:29,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:42:29,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:42:29,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:42:29,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:42:29,386 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 18:42:29,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:42:29,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:42:29,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:42:29,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:42:29,416 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:42:29,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:42:29,416 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:42:29,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:42:29,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:42:29,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:42:29,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:42:29,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:42:29,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:42:29,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:42:29,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:42:29,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:42:29,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:42:29,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:42:29,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:42:29,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:42:29,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:42:29,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:42:29,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:42:29,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:42:29,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:42:29,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:42:29,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:42:29,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:42:29,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:42:29,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:42:29,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:42:29,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:42:29,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:42:29,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:42:29,892 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:42:29,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-10-23 18:42:29,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e5ae19b/b745bc6679874bb393c2db7c81e6f4f3/FLAG98c0ac966 [2020-10-23 18:42:30,580 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:42:30,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-10-23 18:42:30,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e5ae19b/b745bc6679874bb393c2db7c81e6f4f3/FLAG98c0ac966 [2020-10-23 18:42:30,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e5ae19b/b745bc6679874bb393c2db7c81e6f4f3 [2020-10-23 18:42:30,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:42:30,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:42:30,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:30,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:42:30,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:42:30,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:30" (1/1) ... [2020-10-23 18:42:30,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e76842d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:30, skipping insertion in model container [2020-10-23 18:42:30,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:30" (1/1) ... [2020-10-23 18:42:30,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:42:30,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:42:31,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:31,137 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:42:31,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:31,182 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:42:31,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31 WrapperNode [2020-10-23 18:42:31,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:31,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:42:31,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:42:31,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:42:31,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (1/1) ... [2020-10-23 18:42:31,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (1/1) ... [2020-10-23 18:42:31,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (1/1) ... [2020-10-23 18:42:31,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (1/1) ... [2020-10-23 18:42:31,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (1/1) ... [2020-10-23 18:42:31,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (1/1) ... [2020-10-23 18:42:31,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (1/1) ... [2020-10-23 18:42:31,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:42:31,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:42:31,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:42:31,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:42:31,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (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 18:42:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:42:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:42:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:42:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:42:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:42:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:42:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:42:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:42:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:42:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:42:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:42:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:42:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:42:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:42:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:42:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:42:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:42:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:42:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:42:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:42:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:42:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:42:31,809 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:42:31,809 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 18:42:31,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:31 BoogieIcfgContainer [2020-10-23 18:42:31,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:42:31,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:42:31,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:42:31,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:42:31,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:42:30" (1/3) ... [2020-10-23 18:42:31,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff68897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:31, skipping insertion in model container [2020-10-23 18:42:31,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:31" (2/3) ... [2020-10-23 18:42:31,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff68897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:31, skipping insertion in model container [2020-10-23 18:42:31,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:31" (3/3) ... [2020-10-23 18:42:31,821 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-10-23 18:42:31,837 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:42:31,843 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:42:31,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:42:31,890 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:42:31,890 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:42:31,890 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:42:31,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:42:31,891 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:42:31,891 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:42:31,891 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:42:31,891 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:42:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-23 18:42:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:42:31,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:31,920 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] [2020-10-23 18:42:31,920 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-23 18:42:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:31,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752118475] [2020-10-23 18:42:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:32,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:32,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:32,242 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 18:42:32,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752118475] [2020-10-23 18:42:32,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:32,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:42:32,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852293283] [2020-10-23 18:42:32,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:42:32,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:32,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:42:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:42:32,267 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-23 18:42:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:32,408 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-23 18:42:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:42:32,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-23 18:42:32,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:32,418 INFO L225 Difference]: With dead ends: 59 [2020-10-23 18:42:32,418 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:42:32,422 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 18:42:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:42:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:42:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:42:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-23 18:42:32,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-10-23 18:42:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:32,469 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-23 18:42:32,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:42:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-23 18:42:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:42:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:32,470 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] [2020-10-23 18:42:32,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:42:32,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:32,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1173980304, now seen corresponding path program 1 times [2020-10-23 18:42:32,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:32,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115783697] [2020-10-23 18:42:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:32,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:32,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:32,646 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 18:42:32,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115783697] [2020-10-23 18:42:32,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:32,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:42:32,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991211270] [2020-10-23 18:42:32,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:42:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:42:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:42:32,651 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-23 18:42:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:32,808 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-23 18:42:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:42:32,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-23 18:42:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:32,811 INFO L225 Difference]: With dead ends: 42 [2020-10-23 18:42:32,811 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 18:42:32,812 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 [2020-10-23 18:42:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 18:42:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-23 18:42:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-23 18:42:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-23 18:42:32,822 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-23 18:42:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:32,823 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-23 18:42:32,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:42:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-23 18:42:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:42:32,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:32,824 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 18:42:32,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:42:32,825 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:32,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-23 18:42:32,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:32,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385130895] [2020-10-23 18:42:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:33,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:33,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385130895] [2020-10-23 18:42:33,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903555187] [2020-10-23 18:42:33,218 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 18:42:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:42:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:33,448 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:42:33,450 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:33,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:33,462 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:42:33,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-10-23 18:42:33,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:33,522 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-23 18:42:33,524 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:33,537 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:33,537 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:42:33,538 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-10-23 18:42:33,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:33,854 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:33,855 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-10-23 18:42:33,856 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:33,877 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:33,889 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-23 18:42:33,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:48 [2020-10-23 18:42:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:34,111 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:34,112 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2020-10-23 18:42:34,114 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:34,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:34,130 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:42:34,131 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-10-23 18:42:34,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:34,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:42:34,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-10-23 18:42:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735054029] [2020-10-23 18:42:34,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:42:34,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:42:34,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:42:34,238 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 21 states. [2020-10-23 18:42:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:35,208 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-23 18:42:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:42:35,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2020-10-23 18:42:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:35,211 INFO L225 Difference]: With dead ends: 51 [2020-10-23 18:42:35,212 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:42:35,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:42:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:42:35,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-23 18:42:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:42:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-23 18:42:35,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-10-23 18:42:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:35,223 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-23 18:42:35,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:42:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-23 18:42:35,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:42:35,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:35,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:35,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:42:35,440 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1138583351, now seen corresponding path program 2 times [2020-10-23 18:42:35,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:35,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263262135] [2020-10-23 18:42:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:35,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:35,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:35,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263262135] [2020-10-23 18:42:35,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466363422] [2020-10-23 18:42:35,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:35,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:42:35,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:42:35,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:35,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:42:35,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-23 18:42:35,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729002715] [2020-10-23 18:42:35,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:42:35,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:42:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:42:35,817 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-10-23 18:42:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:36,196 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-23 18:42:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:42:36,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-23 18:42:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:36,198 INFO L225 Difference]: With dead ends: 47 [2020-10-23 18:42:36,199 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 18:42:36,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:42:36,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 18:42:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-23 18:42:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:42:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-23 18:42:36,208 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-10-23 18:42:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:36,209 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-23 18:42:36,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:42:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-23 18:42:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:42:36,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:36,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:36,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:36,423 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:36,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1887781106, now seen corresponding path program 3 times [2020-10-23 18:42:36,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:36,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936700926] [2020-10-23 18:42:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:36,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:36,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:36,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936700926] [2020-10-23 18:42:36,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965322356] [2020-10-23 18:42:36,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:36,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:42:36,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:42:36,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:36,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:42:36,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-23 18:42:36,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618221488] [2020-10-23 18:42:36,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:42:36,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:42:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:42:36,690 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-10-23 18:42:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:36,963 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-23 18:42:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:42:36,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-23 18:42:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:36,965 INFO L225 Difference]: With dead ends: 51 [2020-10-23 18:42:36,966 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:42:36,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:42:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:42:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-23 18:42:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:42:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-23 18:42:36,985 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-10-23 18:42:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:36,989 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-23 18:42:36,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:42:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-23 18:42:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:42:36,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:36,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:37,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:37,191 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:37,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1759077844, now seen corresponding path program 4 times [2020-10-23 18:42:37,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:37,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933625724] [2020-10-23 18:42:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:42:37,257 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:42:37,317 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:37,349 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:42:37,350 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:42:37,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:42:37,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:42:37 BoogieIcfgContainer [2020-10-23 18:42:37,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:42:37,399 INFO L168 Benchmark]: Toolchain (without parser) took 6498.19 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 112.7 MB in the beginning and 81.1 MB in the end (delta: 31.7 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:37,400 INFO L168 Benchmark]: CDTParser took 1.45 ms. Allocated memory is still 158.3 MB. Free memory is still 130.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:42:37,401 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.93 ms. Allocated memory is still 158.3 MB. Free memory was 112.2 MB in the beginning and 102.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:37,402 INFO L168 Benchmark]: Boogie Preprocessor took 127.08 ms. Allocated memory is still 158.3 MB. Free memory was 102.3 MB in the beginning and 141.2 MB in the end (delta: -39.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:37,403 INFO L168 Benchmark]: RCFGBuilder took 499.62 ms. Allocated memory is still 158.3 MB. Free memory was 141.2 MB in the beginning and 124.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:37,404 INFO L168 Benchmark]: TraceAbstraction took 5584.15 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 124.4 MB in the beginning and 81.1 MB in the end (delta: 43.4 MB). Peak memory consumption was 77.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:37,407 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.45 ms. Allocated memory is still 158.3 MB. Free memory is still 130.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.93 ms. Allocated memory is still 158.3 MB. Free memory was 112.2 MB in the beginning and 102.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 127.08 ms. Allocated memory is still 158.3 MB. Free memory was 102.3 MB in the beginning and 141.2 MB in the end (delta: -39.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 499.62 ms. Allocated memory is still 158.3 MB. Free memory was 141.2 MB in the beginning and 124.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5584.15 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 124.4 MB in the beginning and 81.1 MB in the end (delta: 43.4 MB). Peak memory consumption was 77.2 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=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={3:0}] [L32] COND TRUE i