/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:50,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:50,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:50,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:50,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:50,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:50,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:50,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:50,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:50,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:50,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:50,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:50,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:50,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:50,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:50,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:50,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:50,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:50,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:50,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:50,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:50,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:50,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:50,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:50,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:50,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:50,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:50,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:50,969 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 [2020-08-22 16:56:51,011 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:51,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:51,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:51,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:51,013 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:51,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:51,013 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:51,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:51,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:51,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:51,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:51,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:51,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:51,015 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:51,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:51,017 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:51,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:51,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:51,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:51,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:51,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:51,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:51,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:51,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:51,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:51,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:51,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:51,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:51,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:51,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:51,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:51,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:51,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:51,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:51,368 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:51,369 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-08-22 16:56:51,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbbcfb01/b6d1d37c4c7249f6b9d3cea96475b790/FLAG3d09ade66 [2020-08-22 16:56:51,887 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:51,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-08-22 16:56:51,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbbcfb01/b6d1d37c4c7249f6b9d3cea96475b790/FLAG3d09ade66 [2020-08-22 16:56:52,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbbcfb01/b6d1d37c4c7249f6b9d3cea96475b790 [2020-08-22 16:56:52,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:52,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:52,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:52,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:52,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:52,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e9e7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52, skipping insertion in model container [2020-08-22 16:56:52,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:52,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:52,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:52,477 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:52,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:52,516 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:52,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52 WrapperNode [2020-08-22 16:56:52,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:52,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:52,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:52,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:52,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (1/1) ... [2020-08-22 16:56:52,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:52,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:52,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:52,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:52,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (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 [2020-08-22 16:56:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:56:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:56:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:56:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:56:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:53,008 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:53,008 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:56:53,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:53 BoogieIcfgContainer [2020-08-22 16:56:53,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:53,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:53,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:53,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:53,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:52" (1/3) ... [2020-08-22 16:56:53,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe99233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:53, skipping insertion in model container [2020-08-22 16:56:53,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:52" (2/3) ... [2020-08-22 16:56:53,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe99233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:53, skipping insertion in model container [2020-08-22 16:56:53,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:53" (3/3) ... [2020-08-22 16:56:53,021 INFO L109 eAbstractionObserver]: Analyzing ICFG sqm-iff.c [2020-08-22 16:56:53,032 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:53,039 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:53,053 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:53,080 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:53,080 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:53,080 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:53,080 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:53,081 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:53,081 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:53,081 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:53,081 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-22 16:56:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:53,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:53,107 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] [2020-08-22 16:56:53,107 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-08-22 16:56:53,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:53,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121226195] [2020-08-22 16:56:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:53,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:53,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:53,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121226195] [2020-08-22 16:56:53,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:53,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:53,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032118562] [2020-08-22 16:56:53,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:53,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:53,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:53,371 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-22 16:56:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:53,541 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-22 16:56:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:53,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:56:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:53,553 INFO L225 Difference]: With dead ends: 62 [2020-08-22 16:56:53,553 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 16:56:53,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 16:56:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 16:56:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 16:56:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 16:56:53,605 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 16:56:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:53,606 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 16:56:53,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 16:56:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:53,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:53,608 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] [2020-08-22 16:56:53,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:53,608 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:53,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-08-22 16:56:53,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:53,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842472131] [2020-08-22 16:56:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:53,645 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:53,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595570603] [2020-08-22 16:56:53,646 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 [2020-08-22 16:56:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:53,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:53,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842472131] [2020-08-22 16:56:53,779 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:53,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595570603] [2020-08-22 16:56:53,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:53,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:56:53,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705241140] [2020-08-22 16:56:53,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:53,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:53,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:53,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:53,783 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-08-22 16:56:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:53,868 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-08-22 16:56:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:53,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-22 16:56:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:53,872 INFO L225 Difference]: With dead ends: 56 [2020-08-22 16:56:53,872 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 16:56:53,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 16:56:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-22 16:56:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:56:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 16:56:53,888 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-08-22 16:56:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:53,888 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 16:56:53,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 16:56:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:56:53,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:53,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:54,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:56:54,105 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-08-22 16:56:54,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:54,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116398936] [2020-08-22 16:56:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:54,139 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:54,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504061144] [2020-08-22 16:56:54,140 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 [2020-08-22 16:56:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:54,195 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:54,212 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:54,235 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:56:54,235 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:56:54,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:54,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:54 BoogieIcfgContainer [2020-08-22 16:56:54,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:54,498 INFO L168 Benchmark]: Toolchain (without parser) took 2239.78 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 102.1 MB in the beginning and 93.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:54,499 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:54,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.37 ms. Allocated memory is still 146.3 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:54,501 INFO L168 Benchmark]: Boogie Preprocessor took 130.67 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 181.1 MB in the end (delta: -89.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:54,502 INFO L168 Benchmark]: RCFGBuilder took 363.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 163.0 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:54,503 INFO L168 Benchmark]: TraceAbstraction took 1480.44 ms. Allocated memory is still 203.4 MB. Free memory was 162.0 MB in the beginning and 93.0 MB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:54,507 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.37 ms. Allocated memory is still 146.3 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.67 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 181.1 MB in the end (delta: -89.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 163.0 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1480.44 ms. Allocated memory is still 203.4 MB. Free memory was 162.0 MB in the beginning and 93.0 MB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, b={1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=1] [L29] COND TRUE i