/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/modpf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:09:25,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:09:25,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:09:25,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:09:25,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:09:25,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:09:25,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:09:25,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:09:25,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:09:25,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:09:25,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:09:25,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:09:25,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:09:25,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:09:25,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:09:25,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:09:25,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:09:25,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:09:25,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:09:25,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:09:25,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:09:25,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:09:25,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:09:25,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:09:25,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:09:25,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:09:25,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:09:25,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:09:25,148 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 [2020-07-21 23:09:25,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:09:25,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:09:25,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:09:25,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:09:25,165 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:09:25,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:09:25,166 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:09:25,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:09:25,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:09:25,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:09:25,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:09:25,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:09:25,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:09:25,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:09:25,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:09:25,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:09:25,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:09:25,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:09:25,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:09:25,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:09:25,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:09:25,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:09:25,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:09:25,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:09:25,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:09:25,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:09:25,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:25,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:09:25,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:09:25,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 23:09:25,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:09:25,466 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:09:25,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:09:25,472 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:09:25,472 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:09:25,473 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modpf.c [2020-07-21 23:09:25,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadeda7cd/7067e7fce18846caa746b621508e00d5/FLAGdab0555c3 [2020-07-21 23:09:26,025 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:09:26,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modpf.c [2020-07-21 23:09:26,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadeda7cd/7067e7fce18846caa746b621508e00d5/FLAGdab0555c3 [2020-07-21 23:09:26,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadeda7cd/7067e7fce18846caa746b621508e00d5 [2020-07-21 23:09:26,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:09:26,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:09:26,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:09:26,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:09:26,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:09:26,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,400 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 21.07 11:09:26, skipping insertion in model container [2020-07-21 23:09:26,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:09:26,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:09:26,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:09:26,619 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:09:26,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:09:26,657 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:09:26,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26 WrapperNode [2020-07-21 23:09:26,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:09:26,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:09:26,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:09:26,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:09:26,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (1/1) ... [2020-07-21 23:09:26,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:09:26,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:09:26,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:09:26,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:09:26,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (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 [2020-07-21 23:09:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:09:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:09:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:09:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:09:26,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:09:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:09:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:09:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:09:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:09:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:09:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 23:09:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:09:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 23:09:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 23:09:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 23:09:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 23:09:26,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:09:26,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:09:26,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:09:27,188 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:09:27,189 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 23:09:27,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:09:27 BoogieIcfgContainer [2020-07-21 23:09:27,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:09:27,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:09:27,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:09:27,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:09:27,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:09:26" (1/3) ... [2020-07-21 23:09:27,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6256f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:09:27, skipping insertion in model container [2020-07-21 23:09:27,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:26" (2/3) ... [2020-07-21 23:09:27,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6256f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:09:27, skipping insertion in model container [2020-07-21 23:09:27,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:09:27" (3/3) ... [2020-07-21 23:09:27,203 INFO L109 eAbstractionObserver]: Analyzing ICFG modpf.c [2020-07-21 23:09:27,214 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:09:27,221 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:09:27,235 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:09:27,256 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:09:27,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:09:27,256 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:09:27,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:09:27,256 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:09:27,257 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:09:27,257 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:09:27,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:09:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-21 23:09:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:09:27,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:27,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:09:27,284 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:27,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-21 23:09:27,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:27,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108839153] [2020-07-21 23:09:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:27,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:09:27,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:09:27,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:09:27,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:27,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108839153] [2020-07-21 23:09:27,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:27,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:09:27,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040973347] [2020-07-21 23:09:27,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:09:27,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:09:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:09:27,487 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-21 23:09:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:27,516 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-21 23:09:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:09:27,517 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 23:09:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:27,528 INFO L225 Difference]: With dead ends: 58 [2020-07-21 23:09:27,529 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 23:09:27,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:09:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 23:09:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 23:09:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 23:09:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-21 23:09:27,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-21 23:09:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:27,580 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-21 23:09:27,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:09:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-21 23:09:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:09:27,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:27,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:09:27,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:27,797 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-21 23:09:27,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:27,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728648836] [2020-07-21 23:09:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:27,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:09:27,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:09:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:09:27,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:27,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728648836] [2020-07-21 23:09:27,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:27,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:09:27,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646591649] [2020-07-21 23:09:27,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:09:27,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:27,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:09:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:09:27,979 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-07-21 23:09:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:28,077 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-21 23:09:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:09:28,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 23:09:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:28,081 INFO L225 Difference]: With dead ends: 51 [2020-07-21 23:09:28,081 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 23:09:28,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:09:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 23:09:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-07-21 23:09:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 23:09:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-07-21 23:09:28,107 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-07-21 23:09:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:28,108 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-07-21 23:09:28,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:09:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-07-21 23:09:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 23:09:28,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:28,111 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] [2020-07-21 23:09:28,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:28,325 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-21 23:09:28,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:28,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713609679] [2020-07-21 23:09:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:28,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:09:28,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:09:28,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:09:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:09:28,437 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:09:28,466 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:09:28,466 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:09:28,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:28,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:09:28 BoogieIcfgContainer [2020-07-21 23:09:28,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:09:28,718 INFO L168 Benchmark]: Toolchain (without parser) took 2328.33 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.8 MB in the beginning and 102.7 MB in the end (delta: 113.3 kB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:28,719 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:09:28,720 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.49 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 91.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:28,722 INFO L168 Benchmark]: Boogie Preprocessor took 133.92 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:28,723 INFO L168 Benchmark]: RCFGBuilder took 400.15 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:28,724 INFO L168 Benchmark]: TraceAbstraction took 1520.37 ms. Allocated memory is still 202.4 MB. Free memory was 162.8 MB in the beginning and 102.7 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:28,728 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.49 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 91.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.92 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.15 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1520.37 ms. Allocated memory is still 202.4 MB. Free memory was 162.8 MB in the beginning and 102.7 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 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)=5, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={1:0}, i=0, malloc(sizeof(int)*N)={1:0}, N=1, sum={3:0}] [L30] COND TRUE i