/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:57:19,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:57:19,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:57:19,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:57:19,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:57:19,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:57:19,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:57:19,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:57:19,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:57:19,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:57:19,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:57:19,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:57:19,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:57:19,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:57:19,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:57:19,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:57:19,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:57:19,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:57:19,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:57:19,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:57:19,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:57:19,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:57:19,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:57:19,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:57:19,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:57:19,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:57:19,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:57:19,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:57:19,113 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 [2020-07-20 03:57:19,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:57:19,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:57:19,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:57:19,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:57:19,151 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:57:19,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:57:19,152 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:57:19,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:57:19,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:57:19,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:57:19,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:57:19,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:57:19,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:57:19,153 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:57:19,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:57:19,154 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:57:19,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:57:19,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:57:19,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:57:19,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:57:19,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:57:19,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:57:19,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:57:19,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:57:19,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:57:19,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:57:19,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:57:19,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:57:19,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:57:19,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:57:19,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:57:19,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:57:19,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:57:19,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:57:19,461 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:57:19,462 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-20 03:57:19,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c894589e5/e60cc428aa2a42f381ca06b133515ad4/FLAG9589f1dc6 [2020-07-20 03:57:19,939 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:57:19,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-20 03:57:19,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c894589e5/e60cc428aa2a42f381ca06b133515ad4/FLAG9589f1dc6 [2020-07-20 03:57:20,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c894589e5/e60cc428aa2a42f381ca06b133515ad4 [2020-07-20 03:57:20,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:57:20,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:57:20,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:57:20,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:57:20,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:57:20,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@521f5ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20, skipping insertion in model container [2020-07-20 03:57:20,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:57:20,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:57:20,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:57:20,551 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:57:20,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:57:20,586 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:57:20,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20 WrapperNode [2020-07-20 03:57:20,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:57:20,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:57:20,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:57:20,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:57:20,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (1/1) ... [2020-07-20 03:57:20,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:57:20,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:57:20,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:57:20,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:57:20,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (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 [2020-07-20 03:57:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:57:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:57:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 03:57:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:57:20,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:57:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:57:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 03:57:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 03:57:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:57:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:57:20,765 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 03:57:20,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:57:20,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:57:20,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 03:57:20,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:57:20,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:57:20,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:57:20,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:57:20,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:57:21,066 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:57:21,066 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 03:57:21,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:57:21 BoogieIcfgContainer [2020-07-20 03:57:21,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:57:21,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:57:21,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:57:21,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:57:21,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:57:20" (1/3) ... [2020-07-20 03:57:21,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324dada4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:57:21, skipping insertion in model container [2020-07-20 03:57:21,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:20" (2/3) ... [2020-07-20 03:57:21,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324dada4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:57:21, skipping insertion in model container [2020-07-20 03:57:21,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:57:21" (3/3) ... [2020-07-20 03:57:21,091 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-07-20 03:57:21,101 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:57:21,108 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:57:21,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:57:21,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:57:21,146 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:57:21,146 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:57:21,146 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:57:21,146 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:57:21,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:57:21,147 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:57:21,147 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:57:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 03:57:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 03:57:21,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:21,172 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] [2020-07-20 03:57:21,172 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 03:57:21,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:21,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660161437] [2020-07-20 03:57:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b09e086 [2020-07-20 03:57:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:21,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660161437] [2020-07-20 03:57:21,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:57:21,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:57:21,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023113376] [2020-07-20 03:57:21,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:57:21,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:21,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:57:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:57:21,435 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-20 03:57:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:21,543 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-20 03:57:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:57:21,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 03:57:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:21,553 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:57:21,554 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 03:57:21,557 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 [2020-07-20 03:57:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 03:57:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 03:57:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 03:57:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 03:57:21,598 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-20 03:57:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:21,599 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 03:57:21,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:57:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 03:57:21,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 03:57:21,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:21,601 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] [2020-07-20 03:57:21,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:57:21,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-20 03:57:21,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:21,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877445914] [2020-07-20 03:57:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b09e086 [2020-07-20 03:57:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:21,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877445914] [2020-07-20 03:57:21,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:57:21,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:57:21,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167277544] [2020-07-20 03:57:21,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:57:21,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:57:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:57:21,804 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-20 03:57:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:21,945 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 03:57:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:57:21,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 03:57:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:21,947 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:57:21,947 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:57:21,949 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 [2020-07-20 03:57:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:57:21,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 03:57:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:57:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 03:57:21,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 03:57:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:21,966 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 03:57:21,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:57:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 03:57:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:57:21,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:21,970 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] [2020-07-20 03:57:21,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:57:21,970 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 03:57:21,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:21,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875324283] [2020-07-20 03:57:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b09e086 [2020-07-20 03:57:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:22,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875324283] [2020-07-20 03:57:22,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298530861] [2020-07-20 03:57:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@97c32d1 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 [2020-07-20 03:57:22,646 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@97c32d1 issued 4 check-sat command(s) [2020-07-20 03:57:22,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 03:57:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:22,756 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 [2020-07-20 03:57:22,757 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:22,771 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:22,772 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:22,772 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-20 03:57:22,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 03:57:22,817 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 [2020-07-20 03:57:22,818 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:22,830 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:22,831 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:22,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-20 03:57:23,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 03:57:23,053 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:23,054 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 [2020-07-20 03:57:23,055 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:23,092 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-20 03:57:23,098 INFO L544 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. [2020-07-20 03:57:23,099 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-20 03:57:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 03:57:23,189 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:23,189 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2020-07-20 03:57:23,191 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:23,200 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:23,202 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:23,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-20 03:57:23,231 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 03:57:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:23,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:57:23,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-20 03:57:23,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557572303] [2020-07-20 03:57:23,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 03:57:23,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 03:57:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:57:23,284 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-20 03:57:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:24,051 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-20 03:57:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:57:24,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-20 03:57:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:24,054 INFO L225 Difference]: With dead ends: 49 [2020-07-20 03:57:24,055 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:57:24,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:57:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:57:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-20 03:57:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:57:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 03:57:24,064 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-20 03:57:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:24,064 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 03:57:24,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 03:57:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 03:57:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:57:24,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:24,066 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] [2020-07-20 03:57:24,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:57:24,279 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-20 03:57:24,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:24,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144229805] [2020-07-20 03:57:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b09e086 [2020-07-20 03:57:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:24,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144229805] [2020-07-20 03:57:24,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110877011] [2020-07-20 03:57:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@643ca47d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:24,417 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@643ca47d issued 4 check-sat command(s) [2020-07-20 03:57:24,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:57:24,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:24,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:57:24,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 03:57:24,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339669773] [2020-07-20 03:57:24,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:57:24,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:24,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:57:24,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:57:24,467 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-20 03:57:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:24,671 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-20 03:57:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:57:24,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-20 03:57:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:24,672 INFO L225 Difference]: With dead ends: 45 [2020-07-20 03:57:24,673 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:57:24,673 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 [2020-07-20 03:57:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:57:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-20 03:57:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 03:57:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 03:57:24,685 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-20 03:57:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:24,685 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 03:57:24,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:57:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 03:57:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 03:57:24,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:24,687 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] [2020-07-20 03:57:24,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:24,900 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:24,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-20 03:57:24,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:24,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936823269] [2020-07-20 03:57:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b09e086 [2020-07-20 03:57:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936823269] [2020-07-20 03:57:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336362171] [2020-07-20 03:57:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f7acce1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:25,059 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f7acce1 issued 4 check-sat command(s) [2020-07-20 03:57:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:25,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:57:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:25,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:57:25,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 03:57:25,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091763642] [2020-07-20 03:57:25,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:57:25,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:57:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:57:25,109 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-20 03:57:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:25,274 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-20 03:57:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:57:25,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-20 03:57:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:25,276 INFO L225 Difference]: With dead ends: 49 [2020-07-20 03:57:25,276 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 03:57:25,277 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 [2020-07-20 03:57:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 03:57:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 03:57:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 03:57:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 03:57:25,285 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 03:57:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:25,285 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 03:57:25,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:57:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 03:57:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:57:25,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:25,286 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] [2020-07-20 03:57:25,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:25,501 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:25,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-20 03:57:25,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:25,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896790173] [2020-07-20 03:57:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b09e086 [2020-07-20 03:57:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:57:25,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:57:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:57:25,541 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:57:25,571 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:57:25,572 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:57:25,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 03:57:25,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:57:25 BoogieIcfgContainer [2020-07-20 03:57:25,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:57:25,640 INFO L168 Benchmark]: Toolchain (without parser) took 5315.15 ms. Allocated memory was 138.4 MB in the beginning and 246.4 MB in the end (delta: 108.0 MB). Free memory was 103.4 MB in the beginning and 169.5 MB in the end (delta: -66.1 MB). Peak memory consumption was 41.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:25,641 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 03:57:25,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.88 ms. Allocated memory is still 138.4 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:25,642 INFO L168 Benchmark]: Boogie Preprocessor took 113.58 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:25,643 INFO L168 Benchmark]: RCFGBuilder took 370.85 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.7 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:25,644 INFO L168 Benchmark]: TraceAbstraction took 4564.73 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 162.7 MB in the beginning and 169.5 MB in the end (delta: -6.8 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:25,648 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 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.88 ms. Allocated memory is still 138.4 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.58 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 370.85 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.7 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4564.73 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 162.7 MB in the beginning and 169.5 MB in the end (delta: -6.8 MB). Peak memory consumption was 37.3 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)=12, 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={2:0}] [L30] COND TRUE i