/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 DAGSIZE --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/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:12:49,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:12:49,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:12:49,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:12:49,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:12:49,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:12:49,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:12:49,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:12:49,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:12:49,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:12:49,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:12:49,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:12:49,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:12:49,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:12:49,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:12:49,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:12:49,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:12:49,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:12:49,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:12:49,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:12:49,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:12:49,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:12:49,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:12:49,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:12:49,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:12:49,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:12:49,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:12:49,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:12:49,968 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 22:12:49,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:12:49,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:12:49,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:12:49,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:12:49,999 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:12:49,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:12:49,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:12:49,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:12:49,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:12:50,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:12:50,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:12:50,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:12:50,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:12:50,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:12:50,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:12:50,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:12:50,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:12:50,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:12:50,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:12:50,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:12:50,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:12:50,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:12:50,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:12:50,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:12:50,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:12:50,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:12:50,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:12:50,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:12:50,005 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:12:50,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:12:50,316 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:12:50,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:12:50,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:12:50,322 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:12:50,323 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-20 22:12:50,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f83687d5/7367b075463c40c4ad108ca92ac8a26a/FLAGb27a6cc20 [2020-07-20 22:12:50,908 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:12:50,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-20 22:12:50,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f83687d5/7367b075463c40c4ad108ca92ac8a26a/FLAGb27a6cc20 [2020-07-20 22:12:51,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f83687d5/7367b075463c40c4ad108ca92ac8a26a [2020-07-20 22:12:51,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:12:51,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:12:51,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:51,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:12:51,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:12:51,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230443a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51, skipping insertion in model container [2020-07-20 22:12:51,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:12:51,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:12:51,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:51,568 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:12:51,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:51,617 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:12:51,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51 WrapperNode [2020-07-20 22:12:51,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:51,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:12:51,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:12:51,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:12:51,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (1/1) ... [2020-07-20 22:12:51,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:12:51,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:12:51,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:12:51,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:12:51,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (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 22:12:51,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:12:51,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:12:51,835 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:12:51,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:12:51,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:12:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:12:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:12:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:12:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:12:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:12:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 22:12:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:12:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:12:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 22:12:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:12:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:12:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:12:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:12:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:12:52,182 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:12:52,182 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 22:12:52,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:52 BoogieIcfgContainer [2020-07-20 22:12:52,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:12:52,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:12:52,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:12:52,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:12:52,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:12:51" (1/3) ... [2020-07-20 22:12:52,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7941d05f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:52, skipping insertion in model container [2020-07-20 22:12:52,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:51" (2/3) ... [2020-07-20 22:12:52,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7941d05f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:52, skipping insertion in model container [2020-07-20 22:12:52,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:52" (3/3) ... [2020-07-20 22:12:52,205 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-07-20 22:12:52,218 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:12:52,228 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:12:52,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:12:52,271 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:12:52,271 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:12:52,271 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:12:52,271 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:12:52,272 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:12:52,272 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:12:52,272 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:12:52,272 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:12:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 22:12:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:12:52,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:52,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:52,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-20 22:12:52,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:52,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927477442] [2020-07-20 22:12:52,315 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 22:12:52,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:12:52,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:52,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:52,510 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 22:12:52,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:52,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927477442] [2020-07-20 22:12:52,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:52,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:12:52,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114578744] [2020-07-20 22:12:52,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:12:52,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:12:52,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:12:52,536 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-20 22:12:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:52,688 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-07-20 22:12:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:12:52,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 22:12:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:52,702 INFO L225 Difference]: With dead ends: 66 [2020-07-20 22:12:52,702 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 22:12:52,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 22:12:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 22:12:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-20 22:12:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:12:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 22:12:52,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-20 22:12:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:52,759 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 22:12:52,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:12:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 22:12:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 22:12:52,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:52,761 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] [2020-07-20 22:12:52,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:52,978 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-20 22:12:52,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:52,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513130500] [2020-07-20 22:12:52,980 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 22:12:53,048 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:53,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:12:53,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:53,123 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 22:12:53,124 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:12:53,132 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:12:53,133 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:12:53,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 22:12:53,160 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 22:12:53,161 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:12:53,169 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:12:53,169 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:12:53,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-07-20 22:12:53,185 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:12:53,191 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:12:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:12:53,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:53,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513130500] [2020-07-20 22:12:53,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:53,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 22:12:53,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337579915] [2020-07-20 22:12:53,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:12:53,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:53,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:12:53,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:12:53,230 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-20 22:12:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:53,386 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-20 22:12:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:12:53,388 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-20 22:12:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:53,390 INFO L225 Difference]: With dead ends: 37 [2020-07-20 22:12:53,390 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 22:12:53,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:12:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 22:12:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 22:12:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 22:12:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 22:12:53,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-07-20 22:12:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:53,402 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 22:12:53,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:12:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 22:12:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 22:12:53,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:53,404 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] [2020-07-20 22:12:53,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:53,620 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-07-20 22:12:53,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:53,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106175048] [2020-07-20 22:12:53,623 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 22:12:53,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:53,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:53,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:12:53,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:53,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106175048] [2020-07-20 22:12:53,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:53,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:12:53,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772696451] [2020-07-20 22:12:53,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:12:53,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:12:53,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:53,772 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 3 states. [2020-07-20 22:12:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:53,824 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 22:12:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:12:53,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 22:12:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:53,828 INFO L225 Difference]: With dead ends: 48 [2020-07-20 22:12:53,829 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 22:12:53,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:53,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 22:12:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-20 22:12:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:12:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 22:12:53,839 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-20 22:12:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:53,840 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 22:12:53,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:12:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 22:12:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 22:12:53,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:53,842 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, 1, 1] [2020-07-20 22:12:54,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:54,044 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:54,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-20 22:12:54,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:54,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556642669] [2020-07-20 22:12:54,046 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 22:12:54,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:54,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:12:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:12:54,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:12:54,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556642669] [2020-07-20 22:12:54,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:54,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 22:12:54,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005592677] [2020-07-20 22:12:54,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:12:54,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:12:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:12:54,235 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-07-20 22:12:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:54,387 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 22:12:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:12:54,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-20 22:12:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:54,389 INFO L225 Difference]: With dead ends: 54 [2020-07-20 22:12:54,389 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 22:12:54,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:12:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 22:12:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-07-20 22:12:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 22:12:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 22:12:54,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-20 22:12:54,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:54,400 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 22:12:54,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:12:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 22:12:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 22:12:54,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:54,401 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-20 22:12:54,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:54,615 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:54,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-20 22:12:54,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:54,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969121448] [2020-07-20 22:12:54,618 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:54,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:12:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:12:54,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:12:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:12:54,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:12:54,732 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:12:54,733 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:12:54,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:55,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:12:55 BoogieIcfgContainer [2020-07-20 22:12:55,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:12:55,025 INFO L168 Benchmark]: Toolchain (without parser) took 3725.71 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 102.6 MB in the beginning and 135.3 MB in the end (delta: -32.7 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:55,026 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 22:12:55,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.08 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:55,033 INFO L168 Benchmark]: Boogie Preprocessor took 145.93 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 180.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:55,034 INFO L168 Benchmark]: RCFGBuilder took 426.07 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 163.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:55,035 INFO L168 Benchmark]: TraceAbstraction took 2828.19 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 162.4 MB in the beginning and 135.3 MB in the end (delta: 27.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:55,047 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.08 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.93 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 180.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 426.07 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 163.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2828.19 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 162.4 MB in the beginning and 135.3 MB in the end (delta: 27.1 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)=7, 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] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] COND TRUE i