/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_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:00:23,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:00:23,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:00:23,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:00:23,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:00:23,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:00:23,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:00:23,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:00:23,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:00:23,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:00:23,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:00:23,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:00:23,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:00:23,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:00:23,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:00:23,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:00:23,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:00:23,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:00:23,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:00:23,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:00:23,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:00:23,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:00:23,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:00:23,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:00:23,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:00:23,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:00:23,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:00:23,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:00:23,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:00:23,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:00:23,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:00:23,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:00:23,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:00:23,243 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:00:23,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:00:23,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:00:23,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:00:23,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:00:23,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:00:23,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:00:23,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:00:23,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:00:23,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:00:23,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:00:23,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:00:23,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:00:23,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:00:23,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:00:23,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:00:23,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:00:23,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:00:23,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:00:23,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:00:23,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:00:23,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:00:23,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:23,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:00:23,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:00:23,249 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_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:00:23,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:00:23,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:00:23,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:00:23,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:00:23,555 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:00:23,556 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-21 14:00:23,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de16e092/2f3c8555d3dd4b3eaa9b8f0f6ea76214/FLAG51bda8bb1 [2020-07-21 14:00:24,029 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:00:24,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-21 14:00:24,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de16e092/2f3c8555d3dd4b3eaa9b8f0f6ea76214/FLAG51bda8bb1 [2020-07-21 14:00:24,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de16e092/2f3c8555d3dd4b3eaa9b8f0f6ea76214 [2020-07-21 14:00:24,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:00:24,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:00:24,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:00:24,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:00:24,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:00:24,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476603ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24, skipping insertion in model container [2020-07-21 14:00:24,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:00:24,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:00:24,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:00:24,713 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:00:24,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:00:24,779 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:00:24,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24 WrapperNode [2020-07-21 14:00:24,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:00:24,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:00:24,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:00:24,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:00:24,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... [2020-07-21 14:00:24,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:00:24,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:00:24,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:00:24,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:00:24,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:00:25,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:00:25,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:00:25,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:00:25,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:00:25,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:00:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:00:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:00:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:00:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:00:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:00:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 14:00:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:00:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 14:00:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 14:00:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 14:00:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 14:00:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 14:00:25,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:00:25,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:00:25,368 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:00:25,368 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 14:00:25,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:00:25 BoogieIcfgContainer [2020-07-21 14:00:25,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:00:25,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:00:25,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:00:25,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:00:25,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:00:24" (1/3) ... [2020-07-21 14:00:25,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:00:25, skipping insertion in model container [2020-07-21 14:00:25,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:24" (2/3) ... [2020-07-21 14:00:25,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:00:25, skipping insertion in model container [2020-07-21 14:00:25,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:00:25" (3/3) ... [2020-07-21 14:00:25,381 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-07-21 14:00:25,391 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:00:25,398 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:00:25,414 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:00:25,440 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:00:25,440 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:00:25,440 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:00:25,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:00:25,441 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:00:25,441 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:00:25,441 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:00:25,441 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:00:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 14:00:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 14:00:25,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:25,470 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] [2020-07-21 14:00:25,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 14:00:25,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:25,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620388431] [2020-07-21 14:00:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:25,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:00:25,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:00:25,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:25,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:00:25,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620388431] [2020-07-21 14:00:25,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:00:25,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:00:25,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600862682] [2020-07-21 14:00:25,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:00:25,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:00:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:00:25,720 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-21 14:00:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:25,825 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-21 14:00:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:00:25,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 14:00:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:25,838 INFO L225 Difference]: With dead ends: 63 [2020-07-21 14:00:25,838 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 14:00:25,843 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 [2020-07-21 14:00:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 14:00:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 14:00:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 14:00:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 14:00:25,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 14:00:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:25,888 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 14:00:25,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:00:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 14:00:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 14:00:25,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:25,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:26,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:26,104 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:26,105 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 14:00:26,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:26,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989639705] [2020-07-21 14:00:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:26,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:26,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 14:00:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:26,251 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 [2020-07-21 14:00:26,252 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:00:26,264 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:26,265 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 14:00:26,265 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-21 14:00:26,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:00:26,293 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 [2020-07-21 14:00:26,294 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:00:26,306 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:26,307 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 14:00:26,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 14:00:26,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:00:26,508 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:26,509 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-21 14:00:26,511 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:00:26,590 INFO L624 ElimStorePlain]: treesize reduction 37, result has 56.5 percent of original size [2020-07-21 14:00:26,599 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 14:00:26,599 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:74, output treesize:48 [2020-07-21 14:00:26,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:00:26,695 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:26,696 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 36 treesize of output 28 [2020-07-21 14:00:26,697 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 14:00:26,728 INFO L624 ElimStorePlain]: treesize reduction 13, result has 65.8 percent of original size [2020-07-21 14:00:26,730 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 14:00:26,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:55, output treesize:12 [2020-07-21 14:00:26,754 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:00:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:26,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:00:26,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:00:27,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:00:29,265 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 Int) (main_~a~0.offset Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 2))) (let ((.cse0 (select .cse1 (+ (* v_prenex_1 4) main_~a~0.offset)))) (or (< c_main_~i~0 v_prenex_1) (< v_prenex_1 0) (< c_main_~i~0 (div (+ .cse0 (select (select (store |c_#memory_int| c_main_~a~0.base .cse1) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)) 3)) (not (= 2 .cse0)))))) (forall ((v_prenex_2 Int) (v_main_~i~0_17 Int)) (let ((.cse3 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) v_prenex_2) 2))) (let ((.cse2 (select .cse3 (+ (* v_main_~i~0_17 4) v_prenex_2)))) (or (< v_main_~i~0_17 0) (< (div (+ .cse2 (select (select (store |c_#memory_int| c_main_~a~0.base .cse3) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1)) 3) (+ v_main_~i~0_17 1)) (not (= 2 .cse2)) (< c_main_~i~0 v_main_~i~0_17)))))) is different from false [2020-07-21 14:00:29,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:00:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-07-21 14:00:29,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989639705] [2020-07-21 14:00:29,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:00:29,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 14:00:29,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702014506] [2020-07-21 14:00:29,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 14:00:29,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 14:00:29,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=284, Unknown=1, NotChecked=34, Total=380 [2020-07-21 14:00:29,338 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-07-21 14:00:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:30,627 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-07-21 14:00:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 14:00:30,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-07-21 14:00:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:30,633 INFO L225 Difference]: With dead ends: 51 [2020-07-21 14:00:30,634 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 14:00:30,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=101, Invalid=502, Unknown=1, NotChecked=46, Total=650 [2020-07-21 14:00:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 14:00:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-21 14:00:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 14:00:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 14:00:30,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 14:00:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:30,654 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 14:00:30,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 14:00:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 14:00:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 14:00:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:30,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:30,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:30,874 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 14:00:30,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:30,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139563947] [2020-07-21 14:00:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:30,950 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:30,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:30,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:00:30,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:30,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:00:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:31,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139563947] [2020-07-21 14:00:31,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:00:31,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 14:00:31,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644361974] [2020-07-21 14:00:31,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:00:31,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:31,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:00:31,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:00:31,037 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 14:00:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:31,240 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 14:00:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 14:00:31,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 14:00:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:31,242 INFO L225 Difference]: With dead ends: 45 [2020-07-21 14:00:31,242 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 14:00:31,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 14:00:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 14:00:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 14:00:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 14:00:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 14:00:31,252 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 14:00:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:31,252 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 14:00:31,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:00:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 14:00:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 14:00:31,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:31,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:31,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:31,470 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:31,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 14:00:31,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:31,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295377276] [2020-07-21 14:00:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 14:00:31,518 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:31,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:00:31,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:31,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:00:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:31,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295377276] [2020-07-21 14:00:31,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:00:31,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 14:00:31,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253384988] [2020-07-21 14:00:31,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:00:31,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:31,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:00:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:00:31,634 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 14:00:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:31,800 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 14:00:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 14:00:31,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 14:00:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:31,802 INFO L225 Difference]: With dead ends: 49 [2020-07-21 14:00:31,803 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 14:00:31,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:00:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 14:00:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 14:00:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 14:00:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 14:00:31,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 14:00:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:31,811 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 14:00:31,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:00:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 14:00:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 14:00:31,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:31,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:32,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:32,017 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 14:00:32,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:32,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443392218] [2020-07-21 14:00:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 14:00:32,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 14:00:32,085 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:00:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 14:00:32,106 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:00:32,134 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 14:00:32,134 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 14:00:32,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:32,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:00:32 BoogieIcfgContainer [2020-07-21 14:00:32,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:00:32,391 INFO L168 Benchmark]: Toolchain (without parser) took 7969.37 ms. Allocated memory was 137.9 MB in the beginning and 246.9 MB in the end (delta: 109.1 MB). Free memory was 102.7 MB in the beginning and 112.2 MB in the end (delta: -9.6 MB). Peak memory consumption was 99.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:32,392 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 14:00:32,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.36 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:32,394 INFO L168 Benchmark]: Boogie Preprocessor took 184.69 ms. Allocated memory was 137.9 MB in the beginning and 203.9 MB in the end (delta: 66.1 MB). Free memory was 91.8 MB in the beginning and 181.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:32,394 INFO L168 Benchmark]: RCFGBuilder took 405.79 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 164.5 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:32,395 INFO L168 Benchmark]: TraceAbstraction took 7015.27 ms. Allocated memory was 203.9 MB in the beginning and 246.9 MB in the end (delta: 43.0 MB). Free memory was 163.8 MB in the beginning and 112.2 MB in the end (delta: 51.6 MB). Peak memory consumption was 94.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:32,399 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 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 355.36 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 184.69 ms. Allocated memory was 137.9 MB in the beginning and 203.9 MB in the end (delta: 66.1 MB). Free memory was 91.8 MB in the beginning and 181.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.79 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 164.5 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7015.27 ms. Allocated memory was 203.9 MB in the beginning and 246.9 MB in the end (delta: 43.0 MB). Free memory was 163.8 MB in the beginning and 112.2 MB in the end (delta: 51.6 MB). Peak memory consumption was 94.6 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)=9, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={1143:0}, i=0, malloc(sizeof(int)*N)={1143:0}, N=2, sum={1145:0}] [L30] COND TRUE i