/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:27:59,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:27:59,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:27:59,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:27:59,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:27:59,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:27:59,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:27:59,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:27:59,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:27:59,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:27:59,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:27:59,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:27:59,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:27:59,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:27:59,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:27:59,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:27:59,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:27:59,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:27:59,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:27:59,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:27:59,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:27:59,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:27:59,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:27:59,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:27:59,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:27:59,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:27:59,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:27:59,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:27:59,209 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 16:27:59,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:27:59,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:27:59,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:27:59,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:27:59,226 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:27:59,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:27:59,227 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:27:59,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:27:59,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:27:59,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:27:59,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:27:59,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:27:59,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:27:59,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:27:59,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:27:59,229 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:27:59,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:27:59,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:27:59,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:27:59,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:27:59,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:27:59,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:27:59,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:27:59,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:27:59,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:27:59,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:27:59,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:59,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:27:59,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:27:59,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:27:59,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:27:59,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:27:59,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:27:59,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:27:59,550 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:27:59,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-20 16:27:59,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f67cc745/e7e5edac3d6c445aa0537970a54fde1c/FLAGcd6129001 [2020-07-20 16:28:00,123 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:28:00,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-20 16:28:00,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f67cc745/e7e5edac3d6c445aa0537970a54fde1c/FLAGcd6129001 [2020-07-20 16:28:00,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f67cc745/e7e5edac3d6c445aa0537970a54fde1c [2020-07-20 16:28:00,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:28:00,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:28:00,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:00,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:28:00,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:28:00,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7098db54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00, skipping insertion in model container [2020-07-20 16:28:00,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:28:00,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:28:00,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:00,793 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:28:00,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:00,964 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:28:00,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00 WrapperNode [2020-07-20 16:28:00,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:00,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:28:00,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:28:00,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:28:00,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:00,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:01,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:01,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (1/1) ... [2020-07-20 16:28:01,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:28:01,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:28:01,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:28:01,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:28:01,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (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 16:28:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:28:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:28:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 16:28:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 16:28:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 16:28:01,089 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 16:28:01,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:28:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:28:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 16:28:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 16:28:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 16:28:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 16:28:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 16:28:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 16:28:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:28:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:28:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:28:01,734 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:28:01,735 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 16:28:01,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:01 BoogieIcfgContainer [2020-07-20 16:28:01,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:28:01,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:28:01,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:28:01,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:28:01,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:28:00" (1/3) ... [2020-07-20 16:28:01,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c0d618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:01, skipping insertion in model container [2020-07-20 16:28:01,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:00" (2/3) ... [2020-07-20 16:28:01,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c0d618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:01, skipping insertion in model container [2020-07-20 16:28:01,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:01" (3/3) ... [2020-07-20 16:28:01,750 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-07-20 16:28:01,762 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:28:01,771 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:28:01,787 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:28:01,813 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:28:01,813 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:28:01,813 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:28:01,813 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:28:01,814 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:28:01,814 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:28:01,814 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:28:01,814 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:28:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-07-20 16:28:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 16:28:01,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:01,845 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 16:28:01,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-07-20 16:28:01,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:01,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133376559] [2020-07-20 16:28:01,861 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 16:28:02,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:02,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 16:28:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 16:28:02,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 16:28:02,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133376559] [2020-07-20 16:28:02,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:02,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-20 16:28:02,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220671737] [2020-07-20 16:28:02,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:28:02,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:28:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:28:02,463 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 16 states. [2020-07-20 16:28:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:02,765 INFO L93 Difference]: Finished difference Result 140 states and 211 transitions. [2020-07-20 16:28:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:28:02,768 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-07-20 16:28:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:02,783 INFO L225 Difference]: With dead ends: 140 [2020-07-20 16:28:02,783 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 16:28:02,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:28:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 16:28:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-07-20 16:28:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 16:28:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2020-07-20 16:28:02,854 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 34 [2020-07-20 16:28:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:02,855 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2020-07-20 16:28:02,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:28:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2020-07-20 16:28:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 16:28:02,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:02,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:03,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:03,064 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash -637695571, now seen corresponding path program 1 times [2020-07-20 16:28:03,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:03,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348313304] [2020-07-20 16:28:03,067 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 16:28:03,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:03,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:28:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 16:28:03,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:04,894 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 16:28:06,579 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 16:28:08,180 WARN L838 $PredicateComparison]: unable to prove that (forall ((addflt_~b Int)) (<= (mod addflt_~b 4294967296) (mod c_main_~a~0 4294967296))) is different from false [2020-07-20 16:28:08,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348313304] [2020-07-20 16:28:08,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:28:08,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 16:28:08,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865219758] [2020-07-20 16:28:08,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:28:08,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:08,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:28:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=72, Unknown=1, NotChecked=16, Total=110 [2020-07-20 16:28:08,197 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand 8 states. [2020-07-20 16:28:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:08,434 INFO L93 Difference]: Finished difference Result 123 states and 173 transitions. [2020-07-20 16:28:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:28:08,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-20 16:28:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:08,440 INFO L225 Difference]: With dead ends: 123 [2020-07-20 16:28:08,443 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 16:28:08,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2020-07-20 16:28:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 16:28:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-07-20 16:28:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 16:28:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 124 transitions. [2020-07-20 16:28:08,472 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 124 transitions. Word has length 38 [2020-07-20 16:28:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:08,472 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 124 transitions. [2020-07-20 16:28:08,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:28:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 124 transitions. [2020-07-20 16:28:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 16:28:08,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:08,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:08,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:08,691 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -580437269, now seen corresponding path program 1 times [2020-07-20 16:28:08,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:08,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978312638] [2020-07-20 16:28:08,693 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 16:28:08,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:08,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:28:08,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 16:28:08,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:08,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978312638] [2020-07-20 16:28:08,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:08,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 16:28:08,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231892287] [2020-07-20 16:28:08,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:28:08,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:08,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:28:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:28:08,827 INFO L87 Difference]: Start difference. First operand 88 states and 124 transitions. Second operand 8 states. [2020-07-20 16:28:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:08,930 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2020-07-20 16:28:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:28:08,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-20 16:28:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:08,934 INFO L225 Difference]: With dead ends: 163 [2020-07-20 16:28:08,934 INFO L226 Difference]: Without dead ends: 119 [2020-07-20 16:28:08,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:28:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-07-20 16:28:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-07-20 16:28:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 16:28:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2020-07-20 16:28:08,970 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 38 [2020-07-20 16:28:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:08,974 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2020-07-20 16:28:08,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:28:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2020-07-20 16:28:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 16:28:08,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:08,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:09,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:09,181 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:09,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-07-20 16:28:09,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:09,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90303072] [2020-07-20 16:28:09,183 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 16:28:09,291 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:09,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:09,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:28:09,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 16:28:09,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 16:28:09,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90303072] [2020-07-20 16:28:09,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:09,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 16:28:09,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027359508] [2020-07-20 16:28:09,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:28:09,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:28:09,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:28:09,584 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand 9 states. [2020-07-20 16:28:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:09,951 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2020-07-20 16:28:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:28:09,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-20 16:28:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:09,958 INFO L225 Difference]: With dead ends: 162 [2020-07-20 16:28:09,959 INFO L226 Difference]: Without dead ends: 139 [2020-07-20 16:28:09,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:28:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-20 16:28:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2020-07-20 16:28:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-20 16:28:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2020-07-20 16:28:09,997 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 42 [2020-07-20 16:28:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:09,998 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2020-07-20 16:28:09,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:28:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2020-07-20 16:28:10,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 16:28:10,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:10,001 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2020-07-20 16:28:10,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:10,206 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:10,207 INFO L82 PathProgramCache]: Analyzing trace with hash 481333020, now seen corresponding path program 2 times [2020-07-20 16:28:10,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:10,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929414609] [2020-07-20 16:28:10,208 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 16:28:10,282 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:10,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 16:28:10,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:10,459 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 16:28:10,466 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 16:28:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:28:10,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:10,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929414609] [2020-07-20 16:28:10,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:10,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-20 16:28:10,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197426459] [2020-07-20 16:28:10,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:28:10,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:28:10,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:28:10,519 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand 13 states. [2020-07-20 16:28:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:10,945 INFO L93 Difference]: Finished difference Result 207 states and 278 transitions. [2020-07-20 16:28:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:28:10,949 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-07-20 16:28:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:10,956 INFO L225 Difference]: With dead ends: 207 [2020-07-20 16:28:10,956 INFO L226 Difference]: Without dead ends: 169 [2020-07-20 16:28:10,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:28:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-20 16:28:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 153. [2020-07-20 16:28:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-20 16:28:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2020-07-20 16:28:10,989 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 42 [2020-07-20 16:28:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:10,989 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2020-07-20 16:28:10,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:28:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2020-07-20 16:28:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 16:28:10,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:10,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:11,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:11,201 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-07-20 16:28:11,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:11,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617106249] [2020-07-20 16:28:11,203 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:11,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:11,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 16:28:11,277 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:28:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 16:28:11,300 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:28:11,326 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 16:28:11,326 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 16:28:11,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:11,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:28:11 BoogieIcfgContainer [2020-07-20 16:28:11,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:28:11,578 INFO L168 Benchmark]: Toolchain (without parser) took 11106.63 ms. Allocated memory was 136.8 MB in the beginning and 251.1 MB in the end (delta: 114.3 MB). Free memory was 99.9 MB in the beginning and 115.8 MB in the end (delta: -15.9 MB). Peak memory consumption was 98.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:11,579 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 16:28:11,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 491.44 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 99.5 MB in the beginning and 178.0 MB in the end (delta: -78.5 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:11,581 INFO L168 Benchmark]: Boogie Preprocessor took 47.90 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 175.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:11,582 INFO L168 Benchmark]: RCFGBuilder took 726.10 ms. Allocated memory is still 200.8 MB. Free memory was 175.9 MB in the beginning and 152.0 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:11,583 INFO L168 Benchmark]: TraceAbstraction took 9834.68 ms. Allocated memory was 200.8 MB in the beginning and 251.1 MB in the end (delta: 50.3 MB). Free memory was 151.3 MB in the beginning and 115.8 MB in the end (delta: 35.5 MB). Peak memory consumption was 85.8 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:11,587 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 491.44 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 99.5 MB in the beginning and 178.0 MB in the end (delta: -78.5 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.90 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 175.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 726.10 ms. Allocated memory is still 200.8 MB. Free memory was 175.9 MB in the beginning and 152.0 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9834.68 ms. Allocated memory was 200.8 MB in the beginning and 251.1 MB in the end (delta: 50.3 MB). Free memory was 151.3 MB in the beginning and 115.8 MB in the end (delta: 35.5 MB). Peak memory consumption was 85.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 100, overapproximation of bitwiseAnd at line 98. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); [L218] signed char ea = __VERIFIER_nondet_char(); [L219] unsigned int b ; [L220] unsigned int mb = __VERIFIER_nondet_uint(); [L221] signed char eb = __VERIFIER_nondet_char(); [L222] unsigned int r_add1 ; [L223] unsigned int r_add2 ; [L224] unsigned int zero ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int __retres14 ; VAL [ea=127, eb=-128, ma=33554432, mb=16777216] [L231] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L19] COND TRUE ! m [L20] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L70] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L231] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=-128, ma=33554432, mb=16777216] [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L70] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L232] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-128, \old(m)=16777216] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L19] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L47] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=-128, \old(m)=16777216, __retres4=16777215, e=-128, res=16777215] [L70] return (__retres4); VAL [\old(e)=-128, \old(m)=16777216, \result=72057598349672447, __retres4=16777215, e=-128, res=16777215] [L233] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=72057598349672447, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=16777215] [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=16777215, a=4294967295, b=16777215] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=16777215, a=4294967295, b=16777215] [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=16777215, a=4294967295, b=16777215, ea=127, eb=128] [L104] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.7s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 447 SDtfs, 207 SDslu, 3211 SDs, 0 SdLazy, 489 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 291 GetRequests, 221 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 84 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 236 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 263 ConstructedInterpolants, 0 QuantifiedInterpolants, 19101 SizeOfPredicates, 22 NumberOfNonLiveVariables, 517 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 102/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...