/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:13:55,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:13:55,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:13:55,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:13:55,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:13:55,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:13:55,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:13:55,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:13:55,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:13:55,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:13:55,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:13:55,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:13:55,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:13:55,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:13:55,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:13:55,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:13:55,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:13:55,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:13:55,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:13:55,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:13:55,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:13:55,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:13:55,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:13:55,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:13:55,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:13:55,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:13:55,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:13:55,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:13:55,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:13:55,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:13:55,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:13:55,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:13:55,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:13:55,793 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:13:55,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:13:55,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:13:55,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:13:55,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:13:55,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:13:55,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:13:55,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:13:55,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:13:55,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:13:55,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:13:55,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:13:55,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:13:55,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:13:55,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:13:55,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:13:55,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:13:55,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:13:55,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:13:55,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:13:55,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:13:55,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:13:55,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:55,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:13:55,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:13:55,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:13:56,134 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:13:56,161 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:13:56,165 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:13:56,167 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:13:56,170 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:13:56,171 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-20 22:13:56,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c092f3eb5/ac299268476041fba14b074a960ef2c8/FLAG58bfb1d38 [2020-07-20 22:13:56,722 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:13:56,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-20 22:13:56,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c092f3eb5/ac299268476041fba14b074a960ef2c8/FLAG58bfb1d38 [2020-07-20 22:13:57,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c092f3eb5/ac299268476041fba14b074a960ef2c8 [2020-07-20 22:13:57,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:13:57,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:13:57,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:13:57,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:13:57,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:13:57,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64324cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57, skipping insertion in model container [2020-07-20 22:13:57,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:13:57,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:13:57,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:13:57,342 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:13:57,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:13:57,378 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:13:57,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57 WrapperNode [2020-07-20 22:13:57,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:13:57,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:13:57,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:13:57,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:13:57,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... [2020-07-20 22:13:57,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:13:57,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:13:57,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:13:57,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:13:57,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:13:57,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:13:57,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:13:57,573 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:13:57,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:13:57,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:13:57,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:13:57,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:13:57,574 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:13:57,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:13:57,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:13:57,575 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 22:13:57,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:13:57,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:13:57,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 22:13:57,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:13:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:13:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:13:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:13:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:13:57,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:13:57,913 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 22:13:57,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:13:57 BoogieIcfgContainer [2020-07-20 22:13:57,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:13:57,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:13:57,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:13:57,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:13:57,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:13:57" (1/3) ... [2020-07-20 22:13:57,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afb7970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:13:57, skipping insertion in model container [2020-07-20 22:13:57,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:57" (2/3) ... [2020-07-20 22:13:57,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afb7970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:13:57, skipping insertion in model container [2020-07-20 22:13:57,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:13:57" (3/3) ... [2020-07-20 22:13:57,936 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-20 22:13:57,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:13:57,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:13:57,970 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:13:57,997 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:13:57,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:13:57,998 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:13:57,998 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:13:57,998 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:13:57,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:13:57,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:13:57,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:13:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 22:13:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:13:58,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:58,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:13:58,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 22:13:58,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:58,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210237408] [2020-07-20 22:13:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:58,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:13:58,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:13:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:13:58,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:13:58,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210237408] [2020-07-20 22:13:58,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:13:58,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:13:58,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592770059] [2020-07-20 22:13:58,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:13:58,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:13:58,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:13:58,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:13:58,260 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-20 22:13:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:13:58,400 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-20 22:13:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:13:58,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 22:13:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:13:58,413 INFO L225 Difference]: With dead ends: 63 [2020-07-20 22:13:58,413 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 22:13:58,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:13:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 22:13:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 22:13:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:13:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 22:13:58,466 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 22:13:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:13:58,466 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 22:13:58,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:13:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 22:13:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 22:13:58,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:58,468 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] [2020-07-20 22:13:58,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:58,683 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 22:13:58,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:58,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545987339] [2020-07-20 22:13:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:58,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:13:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:58,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 22:13:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:58,818 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 22:13:58,819 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:13:58,828 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:13:58,829 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:13:58,829 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-20 22:13:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 22:13:58,860 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-20 22:13:58,862 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:13:58,877 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:13:58,877 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:13:58,878 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-20 22:13:59,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 22:13:59,012 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:13:59,013 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 51 treesize of output 49 [2020-07-20 22:13:59,017 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:13:59,057 INFO L624 ElimStorePlain]: treesize reduction 16, result has 69.8 percent of original size [2020-07-20 22:13:59,061 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 22:13:59,061 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:37 [2020-07-20 22:13:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 22:13:59,154 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:13:59,154 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 33 treesize of output 25 [2020-07-20 22:13:59,156 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:13:59,165 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:13:59,166 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:13:59,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:44, output treesize:10 [2020-07-20 22:13:59,189 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:13:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:13:59,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:13:59,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:14:01,551 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) 1))) (let ((.cse0 (select .cse1 (+ (* v_prenex_1 4) main_~a~0.offset)))) (or (not (= 1 .cse0)) (< c_main_~i~0 (div (+ (* (select (select (store |c_#memory_int| c_main_~a~0.base .cse1) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1)) (* .cse0 (- 1))) (- 2))))))) (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) 1))) (let ((.cse2 (select .cse3 (+ (* v_prenex_1 4) main_~a~0.offset)))) (or (not (= 1 .cse2)) (< (div (+ (* (select (select (store |c_#memory_int| c_main_~a~0.base .cse3) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1)) (* .cse2 (- 1)) (- 1)) (- 2)) (+ c_main_~i~0 3))))))) is different from false [2020-07-20 22:14:01,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:14:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-07-20 22:14:01,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545987339] [2020-07-20 22:14:01,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:14:01,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-20 22:14:01,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895061784] [2020-07-20 22:14:01,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 22:14:01,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:14:01,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 22:14:01,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=224, Unknown=1, NotChecked=30, Total=306 [2020-07-20 22:14:01,641 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 18 states. [2020-07-20 22:14:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:14:02,256 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-20 22:14:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 22:14:02,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-07-20 22:14:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:14:02,258 INFO L225 Difference]: With dead ends: 50 [2020-07-20 22:14:02,259 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 22:14:02,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=97, Invalid=412, Unknown=1, NotChecked=42, Total=552 [2020-07-20 22:14:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 22:14:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-20 22:14:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 22:14:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 22:14:02,268 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-20 22:14:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:14:02,269 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 22:14:02,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 22:14:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 22:14:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:14:02,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:02,271 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] [2020-07-20 22:14:02,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:02,479 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-20 22:14:02,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:02,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134314163] [2020-07-20 22:14:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:02,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:14:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:14:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:14:02,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:14:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:02,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:14:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:02,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134314163] [2020-07-20 22:14:02,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:14:02,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 22:14:02,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376505998] [2020-07-20 22:14:02,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:14:02,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:14:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:14:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:14:02,656 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-20 22:14:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:14:02,839 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-20 22:14:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:14:02,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 22:14:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:14:02,842 INFO L225 Difference]: With dead ends: 45 [2020-07-20 22:14:02,842 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 22:14:02,844 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 [2020-07-20 22:14:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 22:14:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-20 22:14:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 22:14:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 22:14:02,859 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-20 22:14:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:14:02,860 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 22:14:02,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:14:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 22:14:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:14:02,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:02,862 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] [2020-07-20 22:14:03,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:03,077 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-20 22:14:03,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:03,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110730139] [2020-07-20 22:14:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:03,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:14:03,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:14:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:14:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:14:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:03,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:14:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:03,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110730139] [2020-07-20 22:14:03,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:14:03,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 22:14:03,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44151047] [2020-07-20 22:14:03,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:14:03,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:14:03,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:14:03,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:14:03,219 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-20 22:14:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:14:03,373 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-20 22:14:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:14:03,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 22:14:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:14:03,375 INFO L225 Difference]: With dead ends: 49 [2020-07-20 22:14:03,375 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:14:03,376 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 [2020-07-20 22:14:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:14:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 22:14:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:14:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 22:14:03,382 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 22:14:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:14:03,383 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 22:14:03,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:14:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 22:14:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:14:03,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:03,384 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] [2020-07-20 22:14:03,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:03,598 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-20 22:14:03,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:03,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243530437] [2020-07-20 22:14:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:03,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:14:03,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:14:03,674 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:14:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:14:03,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:14:03,747 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:14:03,747 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:14:03,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:03,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:14:03 BoogieIcfgContainer [2020-07-20 22:14:03,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:14:03,996 INFO L168 Benchmark]: Toolchain (without parser) took 6888.12 ms. Allocated memory was 139.5 MB in the beginning and 244.3 MB in the end (delta: 104.9 MB). Free memory was 103.9 MB in the beginning and 137.8 MB in the end (delta: -33.9 MB). Peak memory consumption was 71.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:03,997 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 139.5 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 22:14:03,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.98 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 93.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:03,999 INFO L168 Benchmark]: Boogie Preprocessor took 117.88 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 180.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:03,999 INFO L168 Benchmark]: RCFGBuilder took 419.76 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 163.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:04,001 INFO L168 Benchmark]: TraceAbstraction took 6075.65 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 162.5 MB in the beginning and 137.8 MB in the end (delta: 24.7 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:04,004 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 139.5 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.98 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 93.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.88 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 180.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.76 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 163.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6075.65 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 162.5 MB in the beginning and 137.8 MB in the end (delta: 24.7 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=7, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={21656:0}, i=0, malloc(sizeof(int)*N)={21656:0}, N=2, sum={21658:0}] [L30] COND TRUE i