/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 NUM_VARIABLES --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/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:36:40,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:36:40,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:36:40,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:36:40,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:36:40,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:36:40,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:36:40,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:36:40,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:36:40,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:36:40,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:36:40,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:36:40,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:36:40,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:36:40,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:36:40,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:36:40,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:36:40,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:36:40,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:36:40,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:36:40,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:36:40,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:36:40,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:36:40,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:36:40,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:36:40,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:36:40,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:36:40,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:36:40,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:36:40,417 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:36:40,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:36:40,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:36:40,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:36:40,421 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:36:40,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:36:40,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:36:40,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:36:40,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:36:40,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:36:40,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:36:40,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:36:40,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:36:40,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:36:40,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:36:40,424 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:36:40,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:36:40,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:36:40,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:36:40,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:36:40,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:36:40,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:40,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:36:40,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:36:40,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:36:40,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:36:40,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:40,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:36:40,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:36:40,429 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 -> NUM_VARIABLES 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 [2020-07-20 17:36:40,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:36:40,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:36:40,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:36:40,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:36:40,797 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:36:40,797 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2020-07-20 17:36:40,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c938cfc/4d3bc2f4d7e34a2ca07adc1ae0e3c501/FLAG0ce20b209 [2020-07-20 17:36:41,435 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:36:41,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condgf.c [2020-07-20 17:36:41,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c938cfc/4d3bc2f4d7e34a2ca07adc1ae0e3c501/FLAG0ce20b209 [2020-07-20 17:36:41,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c938cfc/4d3bc2f4d7e34a2ca07adc1ae0e3c501 [2020-07-20 17:36:41,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:36:41,815 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:36:41,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:41,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:36:41,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:36:41,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:41" (1/1) ... [2020-07-20 17:36:41,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f165e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:41, skipping insertion in model container [2020-07-20 17:36:41,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:41" (1/1) ... [2020-07-20 17:36:41,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:36:41,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:36:42,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:42,080 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:36:42,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:42,126 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:36:42,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42 WrapperNode [2020-07-20 17:36:42,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:42,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:36:42,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:36:42,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:36:42,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... [2020-07-20 17:36:42,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... [2020-07-20 17:36:42,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... [2020-07-20 17:36:42,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... [2020-07-20 17:36:42,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... [2020-07-20 17:36:42,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... [2020-07-20 17:36:42,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... [2020-07-20 17:36:42,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:36:42,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:36:42,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:36:42,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:36:42,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:42,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:36:42,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:36:42,372 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:36:42,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:36:42,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:36:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:36:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:36:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:36:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:36:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:36:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:36:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:36:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:36:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:36:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:36:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:36:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:36:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:36:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:36:42,790 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:36:42,791 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 17:36:42,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:42 BoogieIcfgContainer [2020-07-20 17:36:42,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:36:42,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:36:42,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:36:42,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:36:42,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:36:41" (1/3) ... [2020-07-20 17:36:42,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0bbde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:42, skipping insertion in model container [2020-07-20 17:36:42,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:42" (2/3) ... [2020-07-20 17:36:42,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0bbde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:42, skipping insertion in model container [2020-07-20 17:36:42,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:42" (3/3) ... [2020-07-20 17:36:42,806 INFO L109 eAbstractionObserver]: Analyzing ICFG condgf.c [2020-07-20 17:36:42,818 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:36:42,825 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:36:42,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:36:42,868 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:36:42,869 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:36:42,869 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:36:42,869 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:36:42,869 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:36:42,870 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:36:42,870 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:36:42,870 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:36:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-20 17:36:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:36:42,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:42,896 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] [2020-07-20 17:36:42,896 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1314310818, now seen corresponding path program 1 times [2020-07-20 17:36:42,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:42,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353227443] [2020-07-20 17:36:42,912 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 [2020-07-20 17:36:43,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:43,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:43,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:36:43,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:43,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:43,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353227443] [2020-07-20 17:36:43,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:43,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:36:43,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748032634] [2020-07-20 17:36:43,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:36:43,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:43,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:36:43,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:43,081 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-07-20 17:36:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:43,113 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2020-07-20 17:36:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:36:43,115 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-20 17:36:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:43,126 INFO L225 Difference]: With dead ends: 66 [2020-07-20 17:36:43,126 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 17:36:43,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 17:36:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 17:36:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:36:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 17:36:43,181 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-07-20 17:36:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:43,181 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 17:36:43,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:36:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 17:36:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:36:43,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:43,183 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] [2020-07-20 17:36:43,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:43,398 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash 34447140, now seen corresponding path program 1 times [2020-07-20 17:36:43,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:43,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963033103] [2020-07-20 17:36:43,400 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 [2020-07-20 17:36:43,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:43,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:43,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963033103] [2020-07-20 17:36:43,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:43,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:36:43,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102932861] [2020-07-20 17:36:43,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:36:43,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:43,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:36:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:43,564 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-07-20 17:36:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:43,676 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-07-20 17:36:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:36:43,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 17:36:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:43,680 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:36:43,681 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 17:36:43,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 17:36:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-20 17:36:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:36:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-20 17:36:43,698 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-07-20 17:36:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:43,699 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-20 17:36:43,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:36:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-20 17:36:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:36:43,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:43,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:43,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:43,916 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:43,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1408881596, now seen corresponding path program 1 times [2020-07-20 17:36:43,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:43,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60918302] [2020-07-20 17:36:43,918 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 [2020-07-20 17:36:43,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:43,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 17:36:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:44,046 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:36:44,048 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:44,058 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:44,060 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:44,060 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-20 17:36:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:36:44,097 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-20 17:36:44,099 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:44,113 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:44,114 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:44,114 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-20 17:36:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:36:44,312 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:44,313 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 44 treesize of output 54 [2020-07-20 17:36:44,316 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:44,363 INFO L624 ElimStorePlain]: treesize reduction 28, result has 62.2 percent of original size [2020-07-20 17:36:44,369 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. [2020-07-20 17:36:44,370 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:46 [2020-07-20 17:36:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:36:44,573 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:44,574 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 34 treesize of output 26 [2020-07-20 17:36:44,576 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:36:44,580 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 17:36:44,611 INFO L624 ElimStorePlain]: treesize reduction 13, result has 68.3 percent of original size [2020-07-20 17:36:44,613 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:44,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:58, output treesize:7 [2020-07-20 17:36:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:48,936 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 17:36:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:48,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60918302] [2020-07-20 17:36:48,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:48,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 17:36:48,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254991165] [2020-07-20 17:36:48,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 17:36:48,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:48,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 17:36:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-07-20 17:36:48,994 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 18 states. [2020-07-20 17:36:55,264 WARN L838 $PredicateComparison]: unable to prove that (and (< c_~N~0 (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)) (forall ((v_prenex_1 Int) (main_~a~0.offset Int)) (let ((.cse0 (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 2))) (+ (select .cse1 (+ (* v_prenex_1 4) main_~a~0.offset)) (select (select (store |c_#memory_int| c_main_~a~0.base .cse1) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|))))) (or (< (+ c_main_~i~0 1) .cse0) (< c_main_~i~0 v_prenex_1) (< v_prenex_1 c_main_~i~0) (< (+ v_prenex_1 1) .cse0)))) (forall ((main_~i~0 Int)) (or (<= c_~N~0 main_~i~0) (< (+ main_~i~0 1) c_~N~0) (< c_~N~0 (+ (select (select |c_#memory_int| c_main_~a~0.base) (+ (* main_~i~0 4) c_main_~a~0.offset)) (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)))))) is different from false [2020-07-20 17:36:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:55,462 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-07-20 17:36:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 17:36:55,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-07-20 17:36:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:55,464 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:36:55,464 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 17:36:55,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=148, Invalid=557, Unknown=1, NotChecked=50, Total=756 [2020-07-20 17:36:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 17:36:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-07-20 17:36:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 17:36:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-07-20 17:36:55,476 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 31 [2020-07-20 17:36:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:55,476 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-07-20 17:36:55,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 17:36:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-07-20 17:36:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:36:55,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:55,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:55,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:55,686 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash -728823226, now seen corresponding path program 1 times [2020-07-20 17:36:55,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:55,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433134715] [2020-07-20 17:36:55,687 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:55,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:36:55,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:36:55,760 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:55,789 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:36:55,789 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:36:56,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:56,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:36:56 BoogieIcfgContainer [2020-07-20 17:36:56,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:36:56,063 INFO L168 Benchmark]: Toolchain (without parser) took 14249.64 ms. Allocated memory was 144.2 MB in the beginning and 248.5 MB in the end (delta: 104.3 MB). Free memory was 101.5 MB in the beginning and 188.3 MB in the end (delta: -86.8 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:56,064 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:36:56,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.60 ms. Allocated memory is still 144.2 MB. Free memory was 101.1 MB in the beginning and 90.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:56,066 INFO L168 Benchmark]: Boogie Preprocessor took 163.20 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 90.7 MB in the beginning and 179.7 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:56,067 INFO L168 Benchmark]: RCFGBuilder took 500.47 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 161.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:56,068 INFO L168 Benchmark]: TraceAbstraction took 13263.47 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 161.4 MB in the beginning and 188.3 MB in the end (delta: -26.9 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:56,071 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.60 ms. Allocated memory is still 144.2 MB. Free memory was 101.1 MB in the beginning and 90.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.20 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 90.7 MB in the beginning and 179.7 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 500.47 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 161.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13263.47 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 161.4 MB in the beginning and 188.3 MB in the end (delta: -26.9 MB). Peak memory consumption was 19.2 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)=7, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long 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={20539:0}] [L30] COND TRUE i