/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:19:05,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:19:05,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:19:05,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:19:05,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:19:05,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:19:05,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:19:05,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:19:05,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:19:05,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:19:05,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:19:05,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:19:05,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:19:05,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:19:05,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:19:05,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:19:05,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:19:05,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:19:05,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:19:05,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:19:05,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:19:05,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:19:05,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:19:05,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:19:05,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:19:05,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:19:05,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:19:05,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:19:05,844 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 20:19:05,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:19:05,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:19:05,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:19:05,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:19:05,864 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:19:05,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:19:05,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:19:05,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:19:05,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:19:05,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:19:05,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:19:05,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:19:05,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:19:05,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:19:05,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:19:05,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:19:05,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:19:05,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:19:05,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:19:05,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:19:05,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:19:05,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:19:05,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:19:05,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:19:05,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:19:05,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:19:05,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:05,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:19:05,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:19:05,869 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 -> 2 [2020-07-21 20:19:06,280 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:19:06,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:19:06,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:19:06,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:19:06,302 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:19:06,303 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 20:19:06,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338cd2326/5a75512f699347338f5737ee8b49cc9e/FLAG1cb9b95e7 [2020-07-21 20:19:06,871 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:19:06,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 20:19:06,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338cd2326/5a75512f699347338f5737ee8b49cc9e/FLAG1cb9b95e7 [2020-07-21 20:19:07,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338cd2326/5a75512f699347338f5737ee8b49cc9e [2020-07-21 20:19:07,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:19:07,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:19:07,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:07,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:19:07,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:19:07,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d24558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07, skipping insertion in model container [2020-07-21 20:19:07,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:19:07,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:19:07,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:07,457 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:19:07,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:07,503 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:19:07,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07 WrapperNode [2020-07-21 20:19:07,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:07,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:19:07,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:19:07,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:19:07,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (1/1) ... [2020-07-21 20:19:07,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:19:07,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:19:07,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:19:07,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:19:07,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (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 20:19:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:19:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:19:07,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:19:07,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:19:07,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:19:07,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:19:07,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:19:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:19:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:19:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:19:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:19:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:19:07,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:19:08,106 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:19:08,106 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 20:19:08,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:08 BoogieIcfgContainer [2020-07-21 20:19:08,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:19:08,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:19:08,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:19:08,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:19:08,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:19:07" (1/3) ... [2020-07-21 20:19:08,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77068f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:08, skipping insertion in model container [2020-07-21 20:19:08,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:07" (2/3) ... [2020-07-21 20:19:08,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77068f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:08, skipping insertion in model container [2020-07-21 20:19:08,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:08" (3/3) ... [2020-07-21 20:19:08,120 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-07-21 20:19:08,129 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:19:08,136 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:19:08,150 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:19:08,173 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:19:08,174 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:19:08,174 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:19:08,174 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:19:08,175 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:19:08,175 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:19:08,175 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:19:08,175 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:19:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 20:19:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 20:19:08,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:08,202 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 20:19:08,203 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 20:19:08,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:08,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769999437] [2020-07-21 20:19:08,217 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 20:19:08,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:19:08,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:19:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:08,415 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 20:19:08,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:19:08,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769999437] [2020-07-21 20:19:08,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:19:08,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:19:08,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632050334] [2020-07-21 20:19:08,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:19:08,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:08,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:19:08,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:19:08,441 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-21 20:19:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:08,595 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-21 20:19:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:19:08,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 20:19:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:08,606 INFO L225 Difference]: With dead ends: 63 [2020-07-21 20:19:08,607 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 20:19:08,613 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 20:19:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 20:19:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 20:19:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 20:19:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 20:19:08,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 20:19:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:08,662 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 20:19:08,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:19:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 20:19:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 20:19:08,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:08,664 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 20:19:08,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:08,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 20:19:08,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:08,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196490340] [2020-07-21 20:19:08,882 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 20:19:08,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:08,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:08,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 20:19:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:09,072 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 20:19:09,073 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:09,087 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:09,088 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:09,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-21 20:19:09,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:09,136 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 20:19:09,140 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:09,157 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:09,158 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:09,158 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 20:19:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:09,423 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:09,424 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 20:19:09,427 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:09,483 INFO L624 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2020-07-21 20:19:09,489 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 20:19:09,489 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:74, output treesize:35 [2020-07-21 20:19:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:09,582 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-07-21 20:19:09,584 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:09,598 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:09,601 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:09,601 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:42, output treesize:10 [2020-07-21 20:19:09,628 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:19:09,678 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 20:19:09,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:09,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:09,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:12,138 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_main_~i~0_17 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) v_prenex_2) 4))) (let ((.cse0 (select .cse1 (+ (* v_main_~i~0_17 4) v_prenex_2)))) (or (not (= 4 .cse0)) (< 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|)) 5)) (< v_main_~i~0_17 0) (< c_main_~i~0 v_main_~i~0_17))))) (forall ((v_prenex_1 Int) (main_~a~0.offset Int)) (let ((.cse3 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 4))) (let ((.cse2 (select .cse3 (+ (* v_prenex_1 4) main_~a~0.offset)))) (or (< c_main_~i~0 v_prenex_1) (< v_prenex_1 0) (not (= 4 .cse2)) (< (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)) 5) (+ v_prenex_1 1))))))) is different from false [2020-07-21 20:19:12,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:12,213 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 20:19:12,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196490340] [2020-07-21 20:19:12,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:12,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 20:19:12,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217374308] [2020-07-21 20:19:12,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 20:19:12,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 20:19:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=284, Unknown=1, NotChecked=34, Total=380 [2020-07-21 20:19:12,219 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-07-21 20:19:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:15,280 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-21 20:19:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 20:19:15,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-07-21 20:19:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:15,285 INFO L225 Difference]: With dead ends: 50 [2020-07-21 20:19:15,285 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 20:19:15,287 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 20:19:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 20:19:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-21 20:19:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 20:19:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 20:19:15,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 20:19:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:15,298 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 20:19:15,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 20:19:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 20:19:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:19:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:15,300 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 20:19:15,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:15,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 20:19:15,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:15,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686606603] [2020-07-21 20:19:15,519 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 20:19:15,597 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:15,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:19:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:15,642 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 20:19:15,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:15,694 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 20:19:15,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686606603] [2020-07-21 20:19:15,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:15,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:19:15,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826820562] [2020-07-21 20:19:15,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:19:15,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:15,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:19:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:19:15,697 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 20:19:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:15,901 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 20:19:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:19:15,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 20:19:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:15,903 INFO L225 Difference]: With dead ends: 45 [2020-07-21 20:19:15,903 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:19:15,904 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 20:19:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:19:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 20:19:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 20:19:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 20:19:15,916 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 20:19:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:15,917 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 20:19:15,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:19:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 20:19:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 20:19:15,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:15,919 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 20:19:16,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:16,135 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 20:19:16,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:16,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487776482] [2020-07-21 20:19:16,137 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 20:19:16,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:19:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:16,235 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 20:19:16,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:16,280 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 20:19:16,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487776482] [2020-07-21 20:19:16,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:16,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:19:16,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807109854] [2020-07-21 20:19:16,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:19:16,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:19:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:19:16,284 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 20:19:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:16,445 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 20:19:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:19:16,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 20:19:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:16,448 INFO L225 Difference]: With dead ends: 49 [2020-07-21 20:19:16,448 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 20:19:16,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:19:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 20:19:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 20:19:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 20:19:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 20:19:16,458 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 20:19:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:16,458 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 20:19:16,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:19:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 20:19:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 20:19:16,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:16,460 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 20:19:16,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:16,674 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:16,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 20:19:16,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:16,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908856182] [2020-07-21 20:19:16,677 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 20:19:16,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:16,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:19:16,730 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:19:16,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:16,778 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:19:16,779 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:19:16,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:17,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:19:17 BoogieIcfgContainer [2020-07-21 20:19:17,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:19:17,049 INFO L168 Benchmark]: Toolchain (without parser) took 9849.72 ms. Allocated memory was 143.1 MB in the beginning and 252.7 MB in the end (delta: 109.6 MB). Free memory was 100.9 MB in the beginning and 124.6 MB in the end (delta: -23.7 MB). Peak memory consumption was 85.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:17,050 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 20:19:17,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.80 ms. Allocated memory is still 143.1 MB. Free memory was 100.5 MB in the beginning and 90.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:17,052 INFO L168 Benchmark]: Boogie Preprocessor took 143.10 ms. Allocated memory was 143.1 MB in the beginning and 198.7 MB in the end (delta: 55.6 MB). Free memory was 90.0 MB in the beginning and 175.9 MB in the end (delta: -85.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:17,053 INFO L168 Benchmark]: RCFGBuilder took 462.96 ms. Allocated memory is still 198.7 MB. Free memory was 175.9 MB in the beginning and 158.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:17,054 INFO L168 Benchmark]: TraceAbstraction took 8935.08 ms. Allocated memory was 198.7 MB in the beginning and 252.7 MB in the end (delta: 54.0 MB). Free memory was 158.4 MB in the beginning and 124.6 MB in the end (delta: 33.8 MB). Peak memory consumption was 87.8 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:17,058 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.80 ms. Allocated memory is still 143.1 MB. Free memory was 100.5 MB in the beginning and 90.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.10 ms. Allocated memory was 143.1 MB in the beginning and 198.7 MB in the end (delta: 55.6 MB). Free memory was 90.0 MB in the beginning and 175.9 MB in the end (delta: -85.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 462.96 ms. Allocated memory is still 198.7 MB. Free memory was 175.9 MB in the beginning and 158.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8935.08 ms. Allocated memory was 198.7 MB in the beginning and 252.7 MB in the end (delta: 54.0 MB). Free memory was 158.4 MB in the beginning and 124.6 MB in the end (delta: 33.8 MB). Peak memory consumption was 87.8 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] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={8366:0}, i=0, malloc(sizeof(int)*N)={8366:0}, N=2, sum={8368:0}] [L30] COND TRUE i