/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/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:42:40,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:40,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:41,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:41,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:41,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:41,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:41,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:41,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:41,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:41,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:41,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:41,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:41,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:41,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:41,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:41,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:41,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:41,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:41,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:41,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:41,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:41,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:41,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:41,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:41,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:42:41,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:42:41,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:42:41,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:42:41,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:42:41,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:42:41,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:42:41,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:42:41,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:41,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:41,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:41,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:42:41,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:41,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:41,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:41,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:41,083 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:41,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:41,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:41,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:41,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:41,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:41,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:41,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:41,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:41,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:41,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:41,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:41,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:41,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:41,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:41,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:41,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:41,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:41,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:41,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:41,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:41,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:41,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:41,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:41,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:41,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:41,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:41,579 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:41,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:41,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:41,586 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:41,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-09-04 13:42:41,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2950a5f90/dac93269344748ebb491b9f2a3bf52f3/FLAG5a849f634 [2020-09-04 13:42:42,230 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:42,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s1iff.c [2020-09-04 13:42:42,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2950a5f90/dac93269344748ebb491b9f2a3bf52f3/FLAG5a849f634 [2020-09-04 13:42:42,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2950a5f90/dac93269344748ebb491b9f2a3bf52f3 [2020-09-04 13:42:42,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:42,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:42,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:42,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:42,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:42,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:42,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb59baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42, skipping insertion in model container [2020-09-04 13:42:42,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:42,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:42,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:42,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:42,899 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:42,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:42,940 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:42,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42 WrapperNode [2020-09-04 13:42:42,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:42,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:42,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:42,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:43,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:43,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:43,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:43,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:43,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:43,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:43,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... [2020-09-04 13:42:43,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:43,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:43,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:43,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:43,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:43,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:43,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:43,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:42:43,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:43,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:42:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:42:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:42:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:42:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:42:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:43,504 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:43,505 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 13:42:43,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:43 BoogieIcfgContainer [2020-09-04 13:42:43,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:43,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:43,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:43,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:43,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:42" (1/3) ... [2020-09-04 13:42:43,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e115ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:43, skipping insertion in model container [2020-09-04 13:42:43,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:42" (2/3) ... [2020-09-04 13:42:43,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e115ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:43, skipping insertion in model container [2020-09-04 13:42:43,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:43" (3/3) ... [2020-09-04 13:42:43,519 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-09-04 13:42:43,541 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:43,550 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:43,573 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:43,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:43,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:43,599 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:43,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:43,599 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:43,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:43,600 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:43,600 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-09-04 13:42:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 13:42:43,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:43,633 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] [2020-09-04 13:42:43,633 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-09-04 13:42:43,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:43,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112598098] [2020-09-04 13:42:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:43,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:43,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:43,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112598098] [2020-09-04 13:42:43,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:43,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:43,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415150909] [2020-09-04 13:42:43,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:43,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:43,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:43,957 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-09-04 13:42:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:44,087 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-09-04 13:42:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:44,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-04 13:42:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:44,099 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:42:44,099 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 13:42:44,104 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 [2020-09-04 13:42:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 13:42:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 13:42:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:42:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-04 13:42:44,154 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-09-04 13:42:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:44,154 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-04 13:42:44,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-04 13:42:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 13:42:44,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:44,156 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] [2020-09-04 13:42:44,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:44,158 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-09-04 13:42:44,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:44,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689802917] [2020-09-04 13:42:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:44,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:44,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:44,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689802917] [2020-09-04 13:42:44,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:44,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:42:44,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429690507] [2020-09-04 13:42:44,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:42:44,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:44,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:42:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:42:44,321 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-09-04 13:42:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:44,467 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-09-04 13:42:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:42:44,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-04 13:42:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:44,469 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:42:44,469 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:42:44,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:42:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:42:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-04 13:42:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:42:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-04 13:42:44,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-09-04 13:42:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:44,479 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-04 13:42:44,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:42:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-04 13:42:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:42:44,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:44,481 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] [2020-09-04 13:42:44,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:42:44,482 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:44,482 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-09-04 13:42:44,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:44,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91904682] [2020-09-04 13:42:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:44,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:44,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:44,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91904682] [2020-09-04 13:42:44,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014432206] [2020-09-04 13:42:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-04 13:42:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:45,093 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 [2020-09-04 13:42:45,094 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:45,106 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:45,106 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:45,107 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-09-04 13:42:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:45,154 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 [2020-09-04 13:42:45,155 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:45,172 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:45,173 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:45,173 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-09-04 13:42:45,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:45,469 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:45,470 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 [2020-09-04 13:42:45,472 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:45,515 INFO L625 ElimStorePlain]: treesize reduction 30, result has 64.3 percent of original size [2020-09-04 13:42:45,530 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. [2020-09-04 13:42:45,530 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:54 [2020-09-04 13:42:45,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:45,694 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:45,695 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 43 treesize of output 31 [2020-09-04 13:42:45,696 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:45,732 INFO L625 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2020-09-04 13:42:45,737 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:45,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:59, output treesize:10 [2020-09-04 13:42:45,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:42:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:45,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:45,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-09-04 13:42:45,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763108020] [2020-09-04 13:42:45,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 13:42:45,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:45,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 13:42:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:42:45,851 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-09-04 13:42:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:46,680 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-09-04 13:42:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:42:46,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-09-04 13:42:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:46,684 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:42:46,684 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:42:46,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:42:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:42:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-04 13:42:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:42:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-09-04 13:42:46,694 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-09-04 13:42:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:46,694 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-09-04 13:42:46,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 13:42:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-09-04 13:42:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:42:46,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:46,696 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] [2020-09-04 13:42:46,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:42:46,911 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-09-04 13:42:46,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:46,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105807567] [2020-09-04 13:42:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:47,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:47,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:47,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105807567] [2020-09-04 13:42:47,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250469066] [2020-09-04 13:42:47,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:47,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:47,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:42:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:47,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:47,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-09-04 13:42:47,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553221315] [2020-09-04 13:42:47,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:42:47,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:42:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:42:47,193 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-09-04 13:42:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:47,424 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-09-04 13:42:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:42:47,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-04 13:42:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:47,426 INFO L225 Difference]: With dead ends: 45 [2020-09-04 13:42:47,426 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:42:47,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:42:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:42:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-09-04 13:42:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 13:42:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-04 13:42:47,435 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-09-04 13:42:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:47,436 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-04 13:42:47,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:42:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-04 13:42:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 13:42:47,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:47,438 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] [2020-09-04 13:42:47,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:47,652 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-09-04 13:42:47,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:47,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84790573] [2020-09-04 13:42:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:47,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:47,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:47,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84790573] [2020-09-04 13:42:47,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912069921] [2020-09-04 13:42:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:47,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-04 13:42:47,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:47,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:42:47,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:47,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:47,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-09-04 13:42:47,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098732993] [2020-09-04 13:42:47,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:42:47,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:47,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:42:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:42:47,877 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-09-04 13:42:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:48,076 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-09-04 13:42:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:42:48,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-04 13:42:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:48,077 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:42:48,078 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:42:48,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:42:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:42:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-04 13:42:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:42:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-04 13:42:48,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-09-04 13:42:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:48,085 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-04 13:42:48,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:42:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-04 13:42:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:42:48,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:48,087 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] [2020-09-04 13:42:48,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:48,296 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-09-04 13:42:48,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:48,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116704451] [2020-09-04 13:42:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:48,326 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:48,352 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:48,380 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:42:48,380 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:42:48,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 13:42:48,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:48 BoogieIcfgContainer [2020-09-04 13:42:48,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:48,424 INFO L168 Benchmark]: Toolchain (without parser) took 5846.54 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 102.3 MB in the beginning and 163.7 MB in the end (delta: -61.4 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:48,425 INFO L168 Benchmark]: CDTParser took 1.46 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-04 13:42:48,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.36 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 91.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:48,427 INFO L168 Benchmark]: Boogie Preprocessor took 122.28 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.2 MB in the beginning and 179.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:48,427 INFO L168 Benchmark]: RCFGBuilder took 445.97 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 163.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:48,428 INFO L168 Benchmark]: TraceAbstraction took 4911.25 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 162.4 MB in the beginning and 163.7 MB in the end (delta: -1.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:48,432 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.46 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.36 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 91.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.28 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.2 MB in the beginning and 179.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 445.97 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 163.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4911.25 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 162.4 MB in the beginning and 163.7 MB in the end (delta: -1.3 MB). Peak memory consumption was 42.3 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)=10, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={5:0}] [L30] COND TRUE i