/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:44:54,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:44:54,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:44:54,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:44:54,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:44:54,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:44:54,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:44:54,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:44:54,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:44:54,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:44:54,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:44:54,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:44:54,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:44:54,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:44:54,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:44:54,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:44:54,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:44:54,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:44:54,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:44:54,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:44:54,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:44:54,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:44:54,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:44:54,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:44:54,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 15:44:54,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 15:44:54,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 15:44:54,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 15:44:54,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 15:44:54,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 15:44:54,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:44:54,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:44:54,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:44:54,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:44:54,781 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:44:54,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:44:54,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:44:54,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:44:54,783 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:44:54,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:44:54,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:44:54,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:44:54,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:44:54,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:44:54,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:44:54,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:44:54,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:44:54,785 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:44:54,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:44:54,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:44:54,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:44:54,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:44:54,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:44:54,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:44:54,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:44:54,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:44:54,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:44:54,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:44:54,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:44:54,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:44:54,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:54,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:44:54,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:44:54,788 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 -> 2 [2020-07-21 15:44:55,062 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:44:55,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:44:55,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:44:55,086 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:44:55,087 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:44:55,087 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 15:44:55,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532b80b19/3171868a006d42279f89a54ce9a48e2c/FLAGe420e29c0 [2020-07-21 15:44:55,707 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:44:55,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 15:44:55,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532b80b19/3171868a006d42279f89a54ce9a48e2c/FLAGe420e29c0 [2020-07-21 15:44:56,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532b80b19/3171868a006d42279f89a54ce9a48e2c [2020-07-21 15:44:56,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:44:56,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:44:56,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:56,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:44:56,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:44:56,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545b7894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56, skipping insertion in model container [2020-07-21 15:44:56,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:44:56,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:44:56,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:56,294 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:44:56,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:56,455 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:44:56,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56 WrapperNode [2020-07-21 15:44:56,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:56,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:44:56,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:44:56,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:44:56,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:44:56,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:44:56,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:44:56,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:44:56,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:44:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:44:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:44:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 15:44:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 15:44:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 15:44:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 15:44:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:44:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:44:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 15:44:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 15:44:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 15:44:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 15:44:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 15:44:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 15:44:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:44:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:44:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:44:57,020 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:44:57,021 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 15:44:57,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:57 BoogieIcfgContainer [2020-07-21 15:44:57,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:44:57,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:44:57,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:44:57,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:44:57,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:44:56" (1/3) ... [2020-07-21 15:44:57,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4067548b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:57, skipping insertion in model container [2020-07-21 15:44:57,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (2/3) ... [2020-07-21 15:44:57,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4067548b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:57, skipping insertion in model container [2020-07-21 15:44:57,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:57" (3/3) ... [2020-07-21 15:44:57,033 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-21 15:44:57,044 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:44:57,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:44:57,066 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:44:57,091 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:44:57,091 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:44:57,091 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:44:57,091 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:44:57,091 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:44:57,092 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:44:57,092 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:44:57,092 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:44:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 15:44:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 15:44:57,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:57,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2020-07-21 15:44:57,121 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:57,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 15:44:57,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:57,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648289530] [2020-07-21 15:44:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:57,243 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:57,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:57,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 15:44:57,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 15:44:57,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:44:57,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648289530] [2020-07-21 15:44:57,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:44:57,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 15:44:57,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927113672] [2020-07-21 15:44:57,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:44:57,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:44:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:44:57,447 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 6 states. [2020-07-21 15:44:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:57,598 INFO L93 Difference]: Finished difference Result 135 states and 209 transitions. [2020-07-21 15:44:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:44:57,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-07-21 15:44:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:57,614 INFO L225 Difference]: With dead ends: 135 [2020-07-21 15:44:57,614 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 15:44:57,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:44:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 15:44:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-07-21 15:44:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 15:44:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 99 transitions. [2020-07-21 15:44:57,679 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 99 transitions. Word has length 48 [2020-07-21 15:44:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:57,680 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 99 transitions. [2020-07-21 15:44:57,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:44:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 99 transitions. [2020-07-21 15:44:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 15:44:57,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:57,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:57,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:57,901 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash -243075725, now seen corresponding path program 1 times [2020-07-21 15:44:57,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:57,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741426499] [2020-07-21 15:44:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:57,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:57,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 15:44:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:58,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:58,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741426499] [2020-07-21 15:44:58,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:58,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:58,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006298500] [2020-07-21 15:44:58,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:58,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:58,022 INFO L87 Difference]: Start difference. First operand 69 states and 99 transitions. Second operand 4 states. [2020-07-21 15:44:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:58,114 INFO L93 Difference]: Finished difference Result 135 states and 194 transitions. [2020-07-21 15:44:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:44:58,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 15:44:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:58,118 INFO L225 Difference]: With dead ends: 135 [2020-07-21 15:44:58,118 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 15:44:58,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 15:44:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-07-21 15:44:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 15:44:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2020-07-21 15:44:58,133 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 52 [2020-07-21 15:44:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:58,133 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2020-07-21 15:44:58,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2020-07-21 15:44:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 15:44:58,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:58,136 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:58,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1378200528, now seen corresponding path program 1 times [2020-07-21 15:44:58,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:58,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802435376] [2020-07-21 15:44:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:58,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:44:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:58,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:58,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802435376] [2020-07-21 15:44:58,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:58,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:58,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217599734] [2020-07-21 15:44:58,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:58,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:58,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:58,478 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand 4 states. [2020-07-21 15:44:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:58,549 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2020-07-21 15:44:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:44:58,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-07-21 15:44:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:58,552 INFO L225 Difference]: With dead ends: 113 [2020-07-21 15:44:58,552 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 15:44:58,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 15:44:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-21 15:44:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 15:44:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-07-21 15:44:58,564 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 55 [2020-07-21 15:44:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:58,565 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-07-21 15:44:58,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-07-21 15:44:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 15:44:58,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:58,567 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:58,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2077112034, now seen corresponding path program 1 times [2020-07-21 15:44:58,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:58,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154809168] [2020-07-21 15:44:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,831 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:58,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:44:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:58,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:58,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154809168] [2020-07-21 15:44:58,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:58,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:58,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242499329] [2020-07-21 15:44:58,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:58,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:58,864 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand 4 states. [2020-07-21 15:44:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:58,924 INFO L93 Difference]: Finished difference Result 124 states and 168 transitions. [2020-07-21 15:44:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:44:58,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-07-21 15:44:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:58,926 INFO L225 Difference]: With dead ends: 124 [2020-07-21 15:44:58,926 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 15:44:58,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 15:44:58,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-21 15:44:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 15:44:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2020-07-21 15:44:58,938 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 56 [2020-07-21 15:44:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:58,939 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2020-07-21 15:44:58,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2020-07-21 15:44:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 15:44:58,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:58,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:59,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,156 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1438634270, now seen corresponding path program 1 times [2020-07-21 15:44:59,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:59,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338024061] [2020-07-21 15:44:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,213 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:44:59,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:44:59,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 15:44:59,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:59,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338024061] [2020-07-21 15:44:59,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:59,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:59,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894627292] [2020-07-21 15:44:59,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:59,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:59,239 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand 4 states. [2020-07-21 15:44:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:59,262 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-07-21 15:44:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:44:59,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-07-21 15:44:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:59,264 INFO L225 Difference]: With dead ends: 77 [2020-07-21 15:44:59,265 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 15:44:59,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 15:44:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-07-21 15:44:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 15:44:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2020-07-21 15:44:59,275 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 56 [2020-07-21 15:44:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:59,275 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2020-07-21 15:44:59,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2020-07-21 15:44:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 15:44:59,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:59,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:59,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,491 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:59,492 INFO L82 PathProgramCache]: Analyzing trace with hash -555510436, now seen corresponding path program 1 times [2020-07-21 15:44:59,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:59,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276612258] [2020-07-21 15:44:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 15:44:59,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:59,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 15:44:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:44:59,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:44:59,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276612258] [2020-07-21 15:44:59,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:44:59,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-21 15:44:59,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546182285] [2020-07-21 15:44:59,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:44:59,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:44:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:44:59,874 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand 11 states. [2020-07-21 15:45:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:00,093 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-07-21 15:45:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:45:00,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-07-21 15:45:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:00,096 INFO L225 Difference]: With dead ends: 104 [2020-07-21 15:45:00,096 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 15:45:00,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:45:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 15:45:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-07-21 15:45:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 15:45:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 124 transitions. [2020-07-21 15:45:00,111 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 124 transitions. Word has length 56 [2020-07-21 15:45:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:00,112 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 124 transitions. [2020-07-21 15:45:00,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:45:00,112 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 124 transitions. [2020-07-21 15:45:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 15:45:00,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:00,113 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:00,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,328 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:00,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1566627686, now seen corresponding path program 1 times [2020-07-21 15:45:00,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:00,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426113618] [2020-07-21 15:45:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:00,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:00,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 15:45:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:00,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:00,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426113618] [2020-07-21 15:45:00,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:00,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:45:00,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832374091] [2020-07-21 15:45:00,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:45:00,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:45:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:45:00,398 INFO L87 Difference]: Start difference. First operand 88 states and 124 transitions. Second operand 4 states. [2020-07-21 15:45:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:00,493 INFO L93 Difference]: Finished difference Result 171 states and 243 transitions. [2020-07-21 15:45:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:00,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-07-21 15:45:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:00,498 INFO L225 Difference]: With dead ends: 171 [2020-07-21 15:45:00,498 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 15:45:00,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 15:45:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2020-07-21 15:45:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 15:45:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2020-07-21 15:45:00,526 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 56 [2020-07-21 15:45:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:00,526 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2020-07-21 15:45:00,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:45:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2020-07-21 15:45:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 15:45:00,528 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:00,528 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:00,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,736 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1588904245, now seen corresponding path program 1 times [2020-07-21 15:45:00,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:00,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33937882] [2020-07-21 15:45:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:00,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:00,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:00,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33937882] [2020-07-21 15:45:00,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:00,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:00,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286498071] [2020-07-21 15:45:00,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:00,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:00,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:00,823 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand 5 states. [2020-07-21 15:45:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:00,938 INFO L93 Difference]: Finished difference Result 179 states and 256 transitions. [2020-07-21 15:45:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:00,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-07-21 15:45:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:00,940 INFO L225 Difference]: With dead ends: 179 [2020-07-21 15:45:00,940 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 15:45:00,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 15:45:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2020-07-21 15:45:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 15:45:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2020-07-21 15:45:00,969 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 57 [2020-07-21 15:45:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:00,970 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2020-07-21 15:45:00,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2020-07-21 15:45:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 15:45:00,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:00,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:01,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:01,176 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1775343747, now seen corresponding path program 1 times [2020-07-21 15:45:01,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:01,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177901431] [2020-07-21 15:45:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:01,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:01,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:01,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:01,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177901431] [2020-07-21 15:45:01,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:01,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 15:45:01,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672026399] [2020-07-21 15:45:01,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:45:01,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:01,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:45:01,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:45:01,336 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 8 states. [2020-07-21 15:45:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:01,432 INFO L93 Difference]: Finished difference Result 190 states and 276 transitions. [2020-07-21 15:45:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:01,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-07-21 15:45:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:01,435 INFO L225 Difference]: With dead ends: 190 [2020-07-21 15:45:01,435 INFO L226 Difference]: Without dead ends: 113 [2020-07-21 15:45:01,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-21 15:45:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-07-21 15:45:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 15:45:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 135 transitions. [2020-07-21 15:45:01,458 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 135 transitions. Word has length 58 [2020-07-21 15:45:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:01,458 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 135 transitions. [2020-07-21 15:45:01,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:45:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 135 transitions. [2020-07-21 15:45:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 15:45:01,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:01,461 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:01,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:01,677 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash 847268444, now seen corresponding path program 1 times [2020-07-21 15:45:01,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:01,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334909705] [2020-07-21 15:45:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:01,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:01,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 15:45:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:01,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:01,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334909705] [2020-07-21 15:45:01,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:01,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 15:45:01,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092168249] [2020-07-21 15:45:01,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:45:01,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:45:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:01,872 INFO L87 Difference]: Start difference. First operand 95 states and 135 transitions. Second operand 10 states. [2020-07-21 15:45:06,195 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 15:45:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:06,375 INFO L93 Difference]: Finished difference Result 212 states and 311 transitions. [2020-07-21 15:45:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:45:06,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-07-21 15:45:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:06,377 INFO L225 Difference]: With dead ends: 212 [2020-07-21 15:45:06,377 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 15:45:06,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:45:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 15:45:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2020-07-21 15:45:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 15:45:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2020-07-21 15:45:06,390 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 60 [2020-07-21 15:45:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:06,391 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2020-07-21 15:45:06,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:45:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2020-07-21 15:45:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 15:45:06,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:06,392 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:06,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:06,608 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash -638539668, now seen corresponding path program 2 times [2020-07-21 15:45:06,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:06,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463156175] [2020-07-21 15:45:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:06,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:06,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:06,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:06,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463156175] [2020-07-21 15:45:06,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:06,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 15:45:06,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108294710] [2020-07-21 15:45:06,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:45:06,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:45:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:06,914 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand 14 states. [2020-07-21 15:45:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:07,072 INFO L93 Difference]: Finished difference Result 253 states and 379 transitions. [2020-07-21 15:45:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 15:45:07,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-07-21 15:45:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:07,075 INFO L225 Difference]: With dead ends: 253 [2020-07-21 15:45:07,075 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 15:45:07,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:45:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 15:45:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 113. [2020-07-21 15:45:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-21 15:45:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2020-07-21 15:45:07,095 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 165 transitions. Word has length 67 [2020-07-21 15:45:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:07,096 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 165 transitions. [2020-07-21 15:45:07,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:45:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 165 transitions. [2020-07-21 15:45:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-21 15:45:07,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:07,100 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:07,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,309 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:07,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1310112356, now seen corresponding path program 2 times [2020-07-21 15:45:07,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:07,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435417676] [2020-07-21 15:45:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:07,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 15:45:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:07,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:07,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435417676] [2020-07-21 15:45:07,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:07,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 15:45:07,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42743679] [2020-07-21 15:45:07,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:45:07,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:45:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:45:07,768 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 18 states. [2020-07-21 15:45:20,862 WARN L193 SmtUtils]: Spent 12.57 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 15:45:31,351 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 15:45:41,952 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 15:45:55,213 WARN L193 SmtUtils]: Spent 8.32 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 15:46:03,666 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 15:46:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:12,381 INFO L93 Difference]: Finished difference Result 282 states and 427 transitions. [2020-07-21 15:46:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 15:46:12,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-07-21 15:46:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:12,384 INFO L225 Difference]: With dead ends: 282 [2020-07-21 15:46:12,384 INFO L226 Difference]: Without dead ends: 179 [2020-07-21 15:46:12,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 62.1s TimeCoverageRelationStatistics Valid=319, Invalid=602, Unknown=9, NotChecked=0, Total=930 [2020-07-21 15:46:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-21 15:46:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 123. [2020-07-21 15:46:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-21 15:46:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 182 transitions. [2020-07-21 15:46:12,406 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 182 transitions. Word has length 72 [2020-07-21 15:46:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:12,407 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 182 transitions. [2020-07-21 15:46:12,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:46:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 182 transitions. [2020-07-21 15:46:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 15:46:12,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:12,414 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:12,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:12,623 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1326090124, now seen corresponding path program 3 times [2020-07-21 15:46:12,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:12,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020950495] [2020-07-21 15:46:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:12,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:12,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:12,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:46:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:46:12,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:46:13,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020950495] [2020-07-21 15:46:13,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:13,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 15:46:13,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769905176] [2020-07-21 15:46:13,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 15:46:13,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:13,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 15:46:13,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:46:13,310 INFO L87 Difference]: Start difference. First operand 123 states and 182 transitions. Second operand 26 states. [2020-07-21 15:46:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:13,692 INFO L93 Difference]: Finished difference Result 379 states and 585 transitions. [2020-07-21 15:46:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 15:46:13,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-07-21 15:46:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:13,698 INFO L225 Difference]: With dead ends: 379 [2020-07-21 15:46:13,699 INFO L226 Difference]: Without dead ends: 266 [2020-07-21 15:46:13,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:46:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-21 15:46:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 149. [2020-07-21 15:46:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 15:46:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 225 transitions. [2020-07-21 15:46:13,736 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 225 transitions. Word has length 85 [2020-07-21 15:46:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:13,738 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 225 transitions. [2020-07-21 15:46:13,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 15:46:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 225 transitions. [2020-07-21 15:46:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 15:46:13,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:13,740 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:13,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:13,954 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:13,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1670472676, now seen corresponding path program 3 times [2020-07-21 15:46:13,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:13,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149815437] [2020-07-21 15:46:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:14,025 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 15:46:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:46:14,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:46:15,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149815437] [2020-07-21 15:46:15,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:15,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 15:46:15,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550574061] [2020-07-21 15:46:15,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 15:46:15,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 15:46:15,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 15:46:15,252 INFO L87 Difference]: Start difference. First operand 149 states and 225 transitions. Second operand 34 states. [2020-07-21 15:46:34,030 WARN L193 SmtUtils]: Spent 12.41 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 15:47:11,711 WARN L193 SmtUtils]: Spent 29.10 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 15:47:36,695 WARN L193 SmtUtils]: Spent 14.65 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 15:48:08,628 WARN L193 SmtUtils]: Spent 11.99 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 15:48:38,244 WARN L193 SmtUtils]: Spent 13.62 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 15:48:57,461 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 15:49:14,527 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 15:49:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:32,479 INFO L93 Difference]: Finished difference Result 386 states and 593 transitions. [2020-07-21 15:49:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 15:49:32,480 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 96 [2020-07-21 15:49:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:32,483 INFO L225 Difference]: With dead ends: 386 [2020-07-21 15:49:32,483 INFO L226 Difference]: Without dead ends: 247 [2020-07-21 15:49:32,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 193.5s TimeCoverageRelationStatistics Valid=913, Invalid=2235, Unknown=44, NotChecked=0, Total=3192 [2020-07-21 15:49:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-21 15:49:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 153. [2020-07-21 15:49:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-21 15:49:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2020-07-21 15:49:32,510 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 96 [2020-07-21 15:49:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:32,510 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2020-07-21 15:49:32,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 15:49:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2020-07-21 15:49:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 15:49:32,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:32,513 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:32,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:32,728 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1931980236, now seen corresponding path program 4 times [2020-07-21 15:49:32,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:32,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644292860] [2020-07-21 15:49:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:32,789 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:32,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:32,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 15:49:32,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:49:33,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:49:35,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644292860] [2020-07-21 15:49:35,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:35,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 15:49:35,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563806831] [2020-07-21 15:49:35,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 15:49:35,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 15:49:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 15:49:35,284 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand 50 states. [2020-07-21 15:49:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:36,710 INFO L93 Difference]: Finished difference Result 613 states and 973 transitions. [2020-07-21 15:49:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 15:49:36,711 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 121 [2020-07-21 15:49:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:36,715 INFO L225 Difference]: With dead ends: 613 [2020-07-21 15:49:36,715 INFO L226 Difference]: Without dead ends: 470 [2020-07-21 15:49:36,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 15:49:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-07-21 15:49:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 221. [2020-07-21 15:49:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 345 transitions. [2020-07-21 15:49:36,772 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 345 transitions. Word has length 121 [2020-07-21 15:49:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:36,773 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 345 transitions. [2020-07-21 15:49:36,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 15:49:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 345 transitions. [2020-07-21 15:49:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 15:49:36,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:36,775 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:36,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:36,989 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:36,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 4 times [2020-07-21 15:49:36,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:36,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115112518] [2020-07-21 15:49:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:37,069 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:49:37,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:49:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 15:49:37,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:37,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115112518] [2020-07-21 15:49:37,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:37,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:49:37,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538185677] [2020-07-21 15:49:37,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:49:37,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:37,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:49:37,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:49:37,117 INFO L87 Difference]: Start difference. First operand 221 states and 345 transitions. Second operand 6 states. [2020-07-21 15:49:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:37,164 INFO L93 Difference]: Finished difference Result 227 states and 350 transitions. [2020-07-21 15:49:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:49:37,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 15:49:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:37,168 INFO L225 Difference]: With dead ends: 227 [2020-07-21 15:49:37,168 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 15:49:37,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:49:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 15:49:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-21 15:49:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 344 transitions. [2020-07-21 15:49:37,185 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 344 transitions. Word has length 126 [2020-07-21 15:49:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:37,186 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 344 transitions. [2020-07-21 15:49:37,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:49:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 344 transitions. [2020-07-21 15:49:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 15:49:37,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:37,188 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:37,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:37,394 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-21 15:49:37,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:37,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204106389] [2020-07-21 15:49:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:37,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 15:49:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 15:49:37,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:37,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204106389] [2020-07-21 15:49:37,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:37,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:49:37,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671502908] [2020-07-21 15:49:37,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:49:37,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:49:37,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:49:37,521 INFO L87 Difference]: Start difference. First operand 221 states and 344 transitions. Second operand 6 states. [2020-07-21 15:49:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:37,581 INFO L93 Difference]: Finished difference Result 237 states and 360 transitions. [2020-07-21 15:49:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:49:37,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 15:49:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:37,585 INFO L225 Difference]: With dead ends: 237 [2020-07-21 15:49:37,585 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 15:49:37,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:49:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 15:49:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-21 15:49:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 340 transitions. [2020-07-21 15:49:37,603 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 340 transitions. Word has length 126 [2020-07-21 15:49:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:37,604 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 340 transitions. [2020-07-21 15:49:37,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:49:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 340 transitions. [2020-07-21 15:49:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-21 15:49:37,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:37,606 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:37,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:37,820 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-07-21 15:49:37,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:37,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927799084] [2020-07-21 15:49:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:37,877 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:37,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:37,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:49:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 15:49:37,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:37,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927799084] [2020-07-21 15:49:37,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:37,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 15:49:37,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256153742] [2020-07-21 15:49:37,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:49:37,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:49:37,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:49:37,936 INFO L87 Difference]: Start difference. First operand 221 states and 340 transitions. Second operand 8 states. [2020-07-21 15:49:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:38,052 INFO L93 Difference]: Finished difference Result 241 states and 362 transitions. [2020-07-21 15:49:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:49:38,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-07-21 15:49:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:38,056 INFO L225 Difference]: With dead ends: 241 [2020-07-21 15:49:38,056 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 15:49:38,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:49:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 15:49:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-21 15:49:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 334 transitions. [2020-07-21 15:49:38,073 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 334 transitions. Word has length 127 [2020-07-21 15:49:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:38,073 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 334 transitions. [2020-07-21 15:49:38,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:49:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 334 transitions. [2020-07-21 15:49:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-21 15:49:38,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:38,076 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:38,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:38,290 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-07-21 15:49:38,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:38,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104837292] [2020-07-21 15:49:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:38,379 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:38,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:49:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 15:49:38,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:38,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104837292] [2020-07-21 15:49:38,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:49:38,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 15:49:38,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629111435] [2020-07-21 15:49:38,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:49:38,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:38,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:49:38,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:49:38,683 INFO L87 Difference]: Start difference. First operand 221 states and 334 transitions. Second operand 9 states. [2020-07-21 15:49:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:38,967 INFO L93 Difference]: Finished difference Result 231 states and 343 transitions. [2020-07-21 15:49:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:49:38,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-07-21 15:49:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:38,971 INFO L225 Difference]: With dead ends: 231 [2020-07-21 15:49:38,971 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 15:49:38,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:49:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 15:49:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-21 15:49:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 15:49:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-07-21 15:49:38,984 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 131 [2020-07-21 15:49:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:38,985 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-07-21 15:49:38,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:49:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-07-21 15:49:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:38,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:38,988 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:39,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:39,202 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 1 times [2020-07-21 15:49:39,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:39,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586526677] [2020-07-21 15:49:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:39,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:39,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:49:39,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 15:49:39,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:39,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586526677] [2020-07-21 15:49:39,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:39,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-21 15:49:39,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180775723] [2020-07-21 15:49:39,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:49:39,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:49:39,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:49:39,475 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 11 states. [2020-07-21 15:49:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:39,731 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-07-21 15:49:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:49:39,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-07-21 15:49:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:39,735 INFO L225 Difference]: With dead ends: 226 [2020-07-21 15:49:39,735 INFO L226 Difference]: Without dead ends: 207 [2020-07-21 15:49:39,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:49:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-21 15:49:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2020-07-21 15:49:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 15:49:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-21 15:49:39,749 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-21 15:49:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:39,750 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-21 15:49:39,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:49:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-21 15:49:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:39,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:39,751 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:39,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:39,957 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:39,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-07-21 15:49:39,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:39,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956480385] [2020-07-21 15:49:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:40,025 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:49:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:41,908 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_mulflt_~b_42 Int)) (< (mod |c_mulflt_#in~a| 4294967296) (mod v_mulflt_~b_42 4294967296))) is different from true [2020-07-21 15:49:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 15:49:41,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:45,982 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 15:49:45,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956480385] [2020-07-21 15:49:45,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:49:45,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 15:49:45,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284026613] [2020-07-21 15:49:45,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:49:45,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:49:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-07-21 15:49:45,985 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 8 states. [2020-07-21 15:49:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:46,124 INFO L93 Difference]: Finished difference Result 240 states and 306 transitions. [2020-07-21 15:49:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:49:46,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-21 15:49:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:46,132 INFO L225 Difference]: With dead ends: 240 [2020-07-21 15:49:46,132 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 15:49:46,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2020-07-21 15:49:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 15:49:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2020-07-21 15:49:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 15:49:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 278 transitions. [2020-07-21 15:49:46,149 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 278 transitions. Word has length 135 [2020-07-21 15:49:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:46,149 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 278 transitions. [2020-07-21 15:49:46,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:49:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 278 transitions. [2020-07-21 15:49:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:46,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:46,151 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:46,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:46,367 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:46,368 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-21 15:49:46,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:46,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084172805] [2020-07-21 15:49:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:46,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 15:49:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 15:49:46,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:47,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084172805] [2020-07-21 15:49:47,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:49:47,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 15:49:47,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978103768] [2020-07-21 15:49:47,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:49:47,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:49:47,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:49:47,087 INFO L87 Difference]: Start difference. First operand 216 states and 278 transitions. Second operand 9 states. [2020-07-21 15:49:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:47,308 INFO L93 Difference]: Finished difference Result 224 states and 290 transitions. [2020-07-21 15:49:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:49:47,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-21 15:49:47,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:47,309 INFO L225 Difference]: With dead ends: 224 [2020-07-21 15:49:47,309 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:49:47,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:49:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:49:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:49:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:49:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:49:47,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 15:49:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:47,313 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:49:47,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:49:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:49:47,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:49:47,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:47,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:49:48,198 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 359 [2020-07-21 15:49:48,319 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 359 [2020-07-21 15:49:48,465 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 359 [2020-07-21 15:49:48,572 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 359 [2020-07-21 15:49:51,824 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 215 DAG size of output: 45 [2020-07-21 15:49:52,924 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 929 DAG size of output: 20 [2020-07-21 15:49:52,935 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:49:52,936 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:49:52,936 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 15:49:52,936 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 15:49:52,936 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-21 15:49:52,936 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 15:49:52,937 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 15:49:52,937 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 15:49:52,937 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (or (not (= 1 |base2flt_#in~m|)) (< (mod base2flt_~m 4294967296) 16777216)) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-21 15:49:52,937 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 15:49:52,937 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 15:49:52,937 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 15:49:52,937 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-21 15:49:52,937 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 15:49:52,938 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 15:49:52,939 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= mulflt_~b |mulflt_#in~b|))) (and (let ((.cse0 (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)))) (or (and (< (mod |mulflt_#in~a| 4294967296) (mod |mulflt_#in~b| 4294967296)) .cse0 (exists ((mulflt_~b Int)) (and (not (= 0 (mod mulflt_~b 4294967296))) (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296))))) (and (not (= (mod |mulflt_#in~b| 4294967296) 0)) .cse0 .cse1) (= 0 mulflt_~__retres10~1))) (or (< (mod |mulflt_#in~a| 4294967296) (mod |mulflt_#in~b| 4294967296)) (and (= mulflt_~a |mulflt_#in~a|) .cse1)))) [2020-07-21 15:49:52,939 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 15:49:52,939 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:49:52,939 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:49:52,939 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:49:52,939 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:49:52,939 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 15:49:52,940 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 15:49:52,940 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 15:49:52,941 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 15:49:52,941 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 15:49:52,941 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 15:49:52,941 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 15:49:52,941 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~zero~0) (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-21 15:49:52,941 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 15:49:52,941 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 15:49:52,941 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (<= (mod main_~b~0 4294967296) 0)) (and .cse0 (<= 1 main_~tmp~2) (<= 1 main_~sb~0)))) [2020-07-21 15:49:52,942 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 15:49:52,942 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 15:49:52,942 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 15:49:52,942 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 15:49:52,942 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 15:49:52,942 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 15:49:52,942 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 15:49:52,942 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 15:49:52,943 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 15:49:52,944 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 15:49:52,944 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 15:49:52,944 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 15:49:52,944 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 15:49:52,944 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 15:49:52,944 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 15:49:52,973 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-21 15:49:52,975 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-21 15:49:52,979 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-21 15:49:52,979 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-21 15:49:52,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:49:52 BoogieIcfgContainer [2020-07-21 15:49:52,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:49:53,000 INFO L168 Benchmark]: Toolchain (without parser) took 296966.13 ms. Allocated memory was 144.7 MB in the beginning and 294.1 MB in the end (delta: 149.4 MB). Free memory was 102.4 MB in the beginning and 236.4 MB in the end (delta: -134.0 MB). Peak memory consumption was 182.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:53,001 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 15:49:53,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 422.80 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.0 MB in the beginning and 178.6 MB in the end (delta: -76.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:53,002 INFO L168 Benchmark]: Boogie Preprocessor took 46.10 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:53,002 INFO L168 Benchmark]: RCFGBuilder took 518.65 ms. Allocated memory is still 201.9 MB. Free memory was 176.5 MB in the beginning and 151.6 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:53,003 INFO L168 Benchmark]: TraceAbstraction took 295969.87 ms. Allocated memory was 201.9 MB in the beginning and 294.1 MB in the end (delta: 92.3 MB). Free memory was 151.0 MB in the beginning and 236.4 MB in the end (delta: -85.5 MB). Peak memory consumption was 173.7 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:53,005 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 422.80 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.0 MB in the beginning and 178.6 MB in the end (delta: -76.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.10 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 518.65 ms. Allocated memory is still 201.9 MB. Free memory was 176.5 MB in the beginning and 151.6 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 295969.87 ms. Allocated memory was 201.9 MB in the beginning and 294.1 MB in the end (delta: 92.3 MB). Free memory was 151.0 MB in the beginning and 236.4 MB in the end (delta: -85.5 MB). Peak memory consumption was 173.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 15:49:53,016 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-21 15:49:53,016 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-21 15:49:53,017 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-21 15:49:53,017 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] Derived loop invariant: ((((\old(a) % 4294967296 < \old(b) % 4294967296 && b % 4294967296 <= \old(a) % 4294967296) && (\exists mulflt_~b : int :: !(0 == mulflt_~b % 4294967296) && mulflt_~b % 4294967296 <= \old(a) % 4294967296)) || ((!(\old(b) % 4294967296 == 0) && b % 4294967296 <= \old(a) % 4294967296) && b == \old(b))) || 0 == __retres10) && (\old(a) % 4294967296 < \old(b) % 4294967296 || (a == \old(a) && b == \old(b))) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (!(\old(m) % 4294967296 <= 0) && (!(1 == \old(m)) || m % 4294967296 < 16777216)) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 290.4s, OverallIterations: 22, TraceHistogramMax: 24, AutomataDifference: 270.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1541 SDtfs, 2892 SDslu, 7864 SDs, 0 SdLazy, 3558 SolverSat, 451 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 8.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2699 GetRequests, 2353 SyntacticMatches, 13 SemanticMatches, 333 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 271.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 698 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 322 PreInvPairs, 889 NumberOfFragments, 169 HoareAnnotationTreeSize, 322 FomulaSimplifications, 8166 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 11144 FormulaSimplificationTreeSizeReductionInter, 4.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 1910 NumberOfCodeBlocks, 1221 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 2440 ConstructedInterpolants, 9 QuantifiedInterpolants, 541412 SizeOfPredicates, 47 NumberOfNonLiveVariables, 4133 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 29 InterpolantComputations, 10 PerfectInterpolantSequences, 6596/9167 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 proved your program to be correct! Received shutdown request...