/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/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:07:59,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:07:59,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:07:59,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:07:59,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:07:59,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:07:59,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:07:59,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:07:59,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:07:59,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:07:59,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:07:59,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:07:59,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:07:59,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:07:59,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:07:59,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:07:59,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:07:59,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:07:59,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:07:59,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:07:59,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:07:59,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:07:59,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:07:59,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:07:59,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:07:59,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:07:59,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:07:59,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:07:59,774 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 21:07:59,800 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:07:59,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:07:59,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:07:59,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:07:59,802 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:07:59,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:07:59,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:07:59,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:07:59,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:07:59,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:07:59,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:07:59,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:07:59,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:07:59,805 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:07:59,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:07:59,805 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:07:59,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:07:59,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:07:59,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:07:59,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:07:59,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:07:59,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:07:59,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:07:59,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:07:59,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:07:59,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:07:59,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:59,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:07:59,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:07:59,808 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 21:08:00,091 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:08:00,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:08:00,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:08:00,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:08:00,109 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:08:00,110 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-20 21:08:00,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6732baf5/bfa8663c070549d4bfb45450294ed488/FLAG20c03b86a [2020-07-20 21:08:00,691 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:08:00,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-20 21:08:00,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6732baf5/bfa8663c070549d4bfb45450294ed488/FLAG20c03b86a [2020-07-20 21:08:01,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6732baf5/bfa8663c070549d4bfb45450294ed488 [2020-07-20 21:08:01,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:08:01,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:08:01,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:08:01,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:08:01,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:08:01,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338ba570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01, skipping insertion in model container [2020-07-20 21:08:01,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:08:01,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:08:01,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:08:01,340 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:08:01,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:08:01,485 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:08:01,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01 WrapperNode [2020-07-20 21:08:01,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:08:01,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:08:01,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:08:01,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:08:01,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:08:01,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:08:01,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:08:01,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:08:01,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (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 21:08:01,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:08:01,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:08:01,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 21:08:01,613 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 21:08:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 21:08:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 21:08:01,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:08:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:08:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 21:08:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 21:08:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 21:08:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 21:08:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 21:08:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 21:08:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:08:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:08:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:08:02,125 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:08:02,126 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 21:08:02,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:02 BoogieIcfgContainer [2020-07-20 21:08:02,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:08:02,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:08:02,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:08:02,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:08:02,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:08:01" (1/3) ... [2020-07-20 21:08:02,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1976bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:02, skipping insertion in model container [2020-07-20 21:08:02,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (2/3) ... [2020-07-20 21:08:02,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1976bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:02, skipping insertion in model container [2020-07-20 21:08:02,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:02" (3/3) ... [2020-07-20 21:08:02,138 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-07-20 21:08:02,146 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:08:02,153 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:08:02,167 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:08:02,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:08:02,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:08:02,193 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:08:02,193 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:08:02,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:08:02,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:08:02,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:08:02,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:08:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-07-20 21:08:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 21:08:02,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:02,218 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 21:08:02,218 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-07-20 21:08:02,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:02,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495924277] [2020-07-20 21:08:02,232 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 21:08:02,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:08:02,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:08:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:02,553 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 21:08:02,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:02,802 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 21:08:02,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495924277] [2020-07-20 21:08:02,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:02,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-20 21:08:02,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800655903] [2020-07-20 21:08:02,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:08:02,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:08:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:08:02,837 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 16 states. [2020-07-20 21:08:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:03,167 INFO L93 Difference]: Finished difference Result 140 states and 211 transitions. [2020-07-20 21:08:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:08:03,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-07-20 21:08:03,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:03,192 INFO L225 Difference]: With dead ends: 140 [2020-07-20 21:08:03,193 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 21:08:03,201 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 21:08:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 21:08:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-07-20 21:08:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 21:08:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2020-07-20 21:08:03,287 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 34 [2020-07-20 21:08:03,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:03,288 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2020-07-20 21:08:03,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:08:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2020-07-20 21:08:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 21:08:03,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:03,292 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 21:08:03,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:03,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash -637695571, now seen corresponding path program 1 times [2020-07-20 21:08:03,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:03,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427109202] [2020-07-20 21:08:03,508 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 21:08:03,614 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:08:03,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:03,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:08:03,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:03,690 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 21:08:03,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:03,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427109202] [2020-07-20 21:08:03,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:03,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 21:08:03,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465968528] [2020-07-20 21:08:03,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:08:03,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:08:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:08:03,694 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand 8 states. [2020-07-20 21:08:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:03,784 INFO L93 Difference]: Finished difference Result 121 states and 160 transitions. [2020-07-20 21:08:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:08:03,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-20 21:08:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:03,788 INFO L225 Difference]: With dead ends: 121 [2020-07-20 21:08:03,788 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 21:08:03,792 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 21:08:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 21:08:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-07-20 21:08:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 21:08:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2020-07-20 21:08:03,807 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 38 [2020-07-20 21:08:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:03,808 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2020-07-20 21:08:03,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:08:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2020-07-20 21:08:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 21:08:03,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:03,811 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 21:08:04,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:04,021 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:04,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-07-20 21:08:04,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:04,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933586] [2020-07-20 21:08:04,022 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 21:08:04,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:04,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:08:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:04,157 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 21:08:04,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:04,275 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 21:08:04,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933586] [2020-07-20 21:08:04,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:04,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 21:08:04,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081078602] [2020-07-20 21:08:04,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:08:04,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:08:04,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:08:04,278 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand 9 states. [2020-07-20 21:08:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:04,510 INFO L93 Difference]: Finished difference Result 137 states and 182 transitions. [2020-07-20 21:08:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:08:04,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-20 21:08:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:04,514 INFO L225 Difference]: With dead ends: 137 [2020-07-20 21:08:04,514 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 21:08:04,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:08:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 21:08:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2020-07-20 21:08:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 21:08:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2020-07-20 21:08:04,535 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 42 [2020-07-20 21:08:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:04,535 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2020-07-20 21:08:04,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:08:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2020-07-20 21:08:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 21:08:04,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:04,538 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 21:08:04,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:04,753 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 2 times [2020-07-20 21:08:04,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:04,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923036263] [2020-07-20 21:08:04,756 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 21:08:04,894 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:08:04,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:04,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:08:04,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 21:08:04,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:06,303 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 21:08:08,787 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 21:08:10,365 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 21:08:10,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923036263] [2020-07-20 21:08:10,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:08:10,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 21:08:10,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560215290] [2020-07-20 21:08:10,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:08:10,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:08:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:08:10,375 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 8 states. [2020-07-20 21:08:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:10,575 INFO L93 Difference]: Finished difference Result 164 states and 220 transitions. [2020-07-20 21:08:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:08:10,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-07-20 21:08:10,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:10,579 INFO L225 Difference]: With dead ends: 164 [2020-07-20 21:08:10,580 INFO L226 Difference]: Without dead ends: 132 [2020-07-20 21:08:10,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:08:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-20 21:08:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2020-07-20 21:08:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-20 21:08:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2020-07-20 21:08:10,600 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 42 [2020-07-20 21:08:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:10,601 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2020-07-20 21:08:10,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:08:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2020-07-20 21:08:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 21:08:10,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:10,604 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 21:08:10,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:10,808 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 481333020, now seen corresponding path program 1 times [2020-07-20 21:08:10,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:10,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114423723] [2020-07-20 21:08:10,810 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 21:08:10,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:08:10,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:10,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 21:08:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:11,046 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:08:11,050 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:08:11,092 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 21:08:11,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:11,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114423723] [2020-07-20 21:08:11,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:11,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-20 21:08:11,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438273125] [2020-07-20 21:08:11,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:08:11,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:11,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:08:11,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:08:11,094 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand 13 states. [2020-07-20 21:08:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:11,467 INFO L93 Difference]: Finished difference Result 207 states and 278 transitions. [2020-07-20 21:08:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:08:11,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-07-20 21:08:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:11,475 INFO L225 Difference]: With dead ends: 207 [2020-07-20 21:08:11,475 INFO L226 Difference]: Without dead ends: 169 [2020-07-20 21:08:11,478 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 21:08:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-20 21:08:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 153. [2020-07-20 21:08:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-20 21:08:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2020-07-20 21:08:11,524 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 42 [2020-07-20 21:08:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:11,526 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2020-07-20 21:08:11,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:08:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2020-07-20 21:08:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 21:08:11,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:11,533 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 21:08:11,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:11,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-07-20 21:08:11,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:11,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839873408] [2020-07-20 21:08:11,740 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 21:08:11,829 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:08:11,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:08:11,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:08:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:08:11,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:08:11,869 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:08:11,869 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:08:12,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:12,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:08:12 BoogieIcfgContainer [2020-07-20 21:08:12,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:08:12,120 INFO L168 Benchmark]: Toolchain (without parser) took 11048.32 ms. Allocated memory was 138.4 MB in the beginning and 247.5 MB in the end (delta: 109.1 MB). Free memory was 102.3 MB in the beginning and 103.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 107.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:08:12,121 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:08:12,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.44 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 178.2 MB in the end (delta: -76.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:08:12,122 INFO L168 Benchmark]: Boogie Preprocessor took 51.59 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 176.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:08:12,123 INFO L168 Benchmark]: RCFGBuilder took 591.86 ms. Allocated memory is still 201.9 MB. Free memory was 176.2 MB in the beginning and 152.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:08:12,124 INFO L168 Benchmark]: TraceAbstraction took 9986.00 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 151.5 MB in the beginning and 103.5 MB in the end (delta: 48.0 MB). Peak memory consumption was 93.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:08:12,128 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 413.44 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 178.2 MB in the end (delta: -76.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.59 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 176.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 591.86 ms. Allocated memory is still 201.9 MB. Free memory was 176.2 MB in the beginning and 152.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9986.00 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 151.5 MB in the beginning and 103.5 MB in the end (delta: 48.0 MB). Peak memory consumption was 93.6 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=4294967295, mb=33554431] [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=4294967295, mb=33554431] [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=4294967295] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=4294967295, e=127, m=4294967295] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=4294967295, e=127, m=4294967295] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=4294967295, e=127, m=4294967295] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=4294967295, e=127, m=4294967295] [L49] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=4294967295, e=127, m=4294967295] [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=4294967295, __retres4=4294967295, e=127, m=4294967295] [L70] return (__retres4); VAL [\old(e)=127, \old(m)=4294967295, \result=4294967295, __retres4=4294967295, e=127, m=4294967295] [L232] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=-128, ma=4294967295, mb=33554431, zero=0] [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-128, \old(m)=33554431] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=33554431, e=-128, m=33554431] [L19] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=33554431, e=-128, m=33554431] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=33554431, e=-128, m=33554431] [L47] COND TRUE 1 VAL [\old(e)=-128, \old(m)=33554431, e=-128, m=33554431] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=33554431, e=-128, m=33554431] [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=-128, \old(m)=33554431, __retres4=4278190080, e=-128, res=4278190080] [L70] return (__retres4); VAL [\old(e)=-128, \old(m)=33554431, \result=-36028797035741184, __retres4=4278190080, e=-128, res=4278190080] [L233] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-36028797035741184, ea=127, eb=-128, ma=4294967295, mb=33554431, zero=0] [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4278190080] [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)=4278190080, a=4294967295, b=4278190080] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [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)=4278190080, a=4294967295, b=4278190080, ea=127, eb=2147483519] [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: 9.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 448 SDtfs, 205 SDslu, 3181 SDs, 0 SdLazy, 484 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 295 GetRequests, 225 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 6.2s 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, 86 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 267 ConstructedInterpolants, 0 QuantifiedInterpolants, 19411 SizeOfPredicates, 21 NumberOfNonLiveVariables, 535 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 106/119 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...