/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 NUM_FUNCTIONS --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/s3iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:38:43,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:38:43,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:38:43,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:38:43,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:38:43,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:38:43,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:38:43,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:38:43,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:38:43,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:38:43,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:38:43,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:38:43,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:38:43,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:38:43,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:38:43,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:38:43,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:38:43,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:38:43,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:38:43,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:38:43,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:38:43,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:38:43,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:38:43,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:38:43,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:38:43,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:38:43,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:38:43,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:38:43,252 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 [2020-07-19 23:38:43,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:38:43,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:38:43,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:38:43,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:38:43,270 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:38:43,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:38:43,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:38:43,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:38:43,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:38:43,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:38:43,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:38:43,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:38:43,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:38:43,272 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:38:43,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:38:43,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:38:43,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:38:43,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:38:43,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:38:43,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:38:43,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:38:43,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:38:43,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:38:43,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:38:43,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:38:43,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:38:43,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:38:43,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:38:43,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:38:43,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:38:43,598 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:38:43,618 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:38:43,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:38:43,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:38:43,625 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:38:43,626 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-19 23:38:43,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d243047a/43f439af9bf94a8d94f5eec8f37df328/FLAG7abef1e5c [2020-07-19 23:38:44,275 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:38:44,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-19 23:38:44,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d243047a/43f439af9bf94a8d94f5eec8f37df328/FLAG7abef1e5c [2020-07-19 23:38:44,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d243047a/43f439af9bf94a8d94f5eec8f37df328 [2020-07-19 23:38:44,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:38:44,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:38:44,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:38:44,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:38:44,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:38:44,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:44,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b386b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44, skipping insertion in model container [2020-07-19 23:38:44,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:44,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:38:44,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:38:44,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:38:44,828 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:38:44,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:38:44,874 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:38:44,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44 WrapperNode [2020-07-19 23:38:44,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:38:44,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:38:44,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:38:44,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:38:44,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:44,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:45,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:45,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:45,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:45,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:45,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (1/1) ... [2020-07-19 23:38:45,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:38:45,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:38:45,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:38:45,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:38:45,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (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 [2020-07-19 23:38:45,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:38:45,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:38:45,117 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:38:45,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:38:45,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:38:45,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:38:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:38:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:38:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:38:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:38:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 23:38:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:38:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:38:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 23:38:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:38:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:38:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:38:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:38:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:38:45,521 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:38:45,522 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 23:38:45,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:38:45 BoogieIcfgContainer [2020-07-19 23:38:45,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:38:45,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:38:45,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:38:45,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:38:45,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:38:44" (1/3) ... [2020-07-19 23:38:45,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c771d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:38:45, skipping insertion in model container [2020-07-19 23:38:45,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:44" (2/3) ... [2020-07-19 23:38:45,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c771d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:38:45, skipping insertion in model container [2020-07-19 23:38:45,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:38:45" (3/3) ... [2020-07-19 23:38:45,536 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-07-19 23:38:45,547 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:38:45,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:38:45,573 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:38:45,608 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:38:45,608 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:38:45,608 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:38:45,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:38:45,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:38:45,610 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:38:45,610 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:38:45,610 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:38:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-19 23:38:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 23:38:45,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:45,639 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] [2020-07-19 23:38:45,640 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-19 23:38:45,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:45,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627571182] [2020-07-19 23:38:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bb15da7 [2020-07-19 23:38:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:45,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627571182] [2020-07-19 23:38:45,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:38:45,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:38:45,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830674286] [2020-07-19 23:38:45,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:38:45,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:38:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:38:45,956 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-19 23:38:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:46,082 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-19 23:38:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:38:46,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-19 23:38:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:46,096 INFO L225 Difference]: With dead ends: 54 [2020-07-19 23:38:46,096 INFO L226 Difference]: Without dead ends: 25 [2020-07-19 23:38:46,101 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 [2020-07-19 23:38:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-19 23:38:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-19 23:38:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 23:38:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-19 23:38:46,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-19 23:38:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:46,152 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-19 23:38:46,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:38:46,152 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-19 23:38:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 23:38:46,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:46,153 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] [2020-07-19 23:38:46,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:38:46,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:46,155 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-19 23:38:46,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:46,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975161076] [2020-07-19 23:38:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bb15da7 [2020-07-19 23:38:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:46,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975161076] [2020-07-19 23:38:46,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:38:46,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:38:46,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668175089] [2020-07-19 23:38:46,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:38:46,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:46,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:38:46,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:38:46,299 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-19 23:38:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:46,443 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-19 23:38:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:38:46,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-19 23:38:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:46,445 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:38:46,446 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:38:46,447 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 [2020-07-19 23:38:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:38:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-19 23:38:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:38:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-19 23:38:46,457 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-19 23:38:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:46,457 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-19 23:38:46,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:38:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-19 23:38:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:38:46,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:46,459 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] [2020-07-19 23:38:46,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:38:46,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:46,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:46,460 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-19 23:38:46,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:46,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307542891] [2020-07-19 23:38:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bb15da7 [2020-07-19 23:38:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:46,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307542891] [2020-07-19 23:38:46,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319262304] [2020-07-19 23:38:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c0e9181 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 [2020-07-19 23:38:47,055 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c0e9181 issued 4 check-sat command(s) [2020-07-19 23:38:47,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:47,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:38:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:47,146 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 [2020-07-19 23:38:47,147 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:47,168 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:47,169 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:38:47,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-19 23:38:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:38:47,226 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 [2020-07-19 23:38:47,232 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:47,247 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:47,248 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:38:47,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-19 23:38:47,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:38:47,526 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:47,527 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 51 treesize of output 49 [2020-07-19 23:38:47,531 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:47,580 INFO L624 ElimStorePlain]: treesize reduction 16, result has 69.8 percent of original size [2020-07-19 23:38:47,587 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-19 23:38:47,587 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:37 [2020-07-19 23:38:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:38:47,722 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:47,723 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 33 treesize of output 25 [2020-07-19 23:38:47,725 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:47,734 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:47,736 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:38:47,736 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:44, output treesize:10 [2020-07-19 23:38:47,771 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 23:38:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:47,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:47,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-07-19 23:38:47,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015608680] [2020-07-19 23:38:47,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:38:47,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:38:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:38:47,834 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-19 23:38:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:48,648 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-19 23:38:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:38:48,649 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-19 23:38:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:48,653 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:38:48,653 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:38:48,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:38:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:38:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-19 23:38:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:38:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-19 23:38:48,665 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-19 23:38:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:48,666 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-19 23:38:48,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:38:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-19 23:38:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:38:48,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:48,667 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] [2020-07-19 23:38:48,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:38:48,882 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-19 23:38:48,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:48,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652907929] [2020-07-19 23:38:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bb15da7 [2020-07-19 23:38:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:48,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652907929] [2020-07-19 23:38:48,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031102164] [2020-07-19 23:38:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19b31ee3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:49,080 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19b31ee3 issued 4 check-sat command(s) [2020-07-19 23:38:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:49,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:38:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:49,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:49,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-19 23:38:49,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426239488] [2020-07-19 23:38:49,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:38:49,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:49,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:38:49,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:38:49,156 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-19 23:38:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:49,418 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-19 23:38:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:38:49,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-19 23:38:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:49,420 INFO L225 Difference]: With dead ends: 45 [2020-07-19 23:38:49,420 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:38:49,422 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 [2020-07-19 23:38:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:38:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-19 23:38:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:38:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-19 23:38:49,432 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-19 23:38:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:49,432 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-19 23:38:49,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:38:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-19 23:38:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 23:38:49,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:49,434 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] [2020-07-19 23:38:49,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:49,636 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-19 23:38:49,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:49,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955975149] [2020-07-19 23:38:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bb15da7 [2020-07-19 23:38:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:49,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955975149] [2020-07-19 23:38:49,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146575992] [2020-07-19 23:38:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5dc310f 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 [2020-07-19 23:38:49,879 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5dc310f issued 4 check-sat command(s) [2020-07-19 23:38:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:38:49,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:49,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:49,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-19 23:38:49,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252875039] [2020-07-19 23:38:49,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:38:49,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:49,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:38:49,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:38:49,938 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-19 23:38:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:50,157 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-19 23:38:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:38:50,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-19 23:38:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:50,159 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:38:50,159 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 23:38:50,164 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 [2020-07-19 23:38:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 23:38:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-19 23:38:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-19 23:38:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-19 23:38:50,181 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-19 23:38:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:50,181 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-19 23:38:50,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:38:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-19 23:38:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:38:50,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:50,184 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] [2020-07-19 23:38:50,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:50,398 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-19 23:38:50,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:50,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811358045] [2020-07-19 23:38:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bb15da7 [2020-07-19 23:38:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:38:50,427 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:38:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:38:50,451 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:38:50,479 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:38:50,479 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:38:50,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 23:38:50,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:38:50 BoogieIcfgContainer [2020-07-19 23:38:50,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:38:50,530 INFO L168 Benchmark]: Toolchain (without parser) took 5949.46 ms. Allocated memory was 144.7 MB in the beginning and 248.5 MB in the end (delta: 103.8 MB). Free memory was 103.0 MB in the beginning and 203.5 MB in the end (delta: -100.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:50,531 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:38:50,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.78 ms. Allocated memory is still 144.7 MB. Free memory was 102.6 MB in the beginning and 91.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:50,533 INFO L168 Benchmark]: Boogie Preprocessor took 153.16 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:50,534 INFO L168 Benchmark]: RCFGBuilder took 497.42 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:50,535 INFO L168 Benchmark]: TraceAbstraction took 4997.16 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 162.2 MB in the beginning and 203.5 MB in the end (delta: -41.3 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:50,539 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.78 ms. Allocated memory is still 144.7 MB. Free memory was 102.6 MB in the beginning and 91.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.16 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 497.42 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4997.16 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 162.2 MB in the beginning and 203.5 MB in the end (delta: -41.3 MB). Peak memory consumption was 4.9 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={2:0}] [L30] COND TRUE i