/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/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:20:35,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:20:35,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:20:35,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:20:35,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:20:35,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:20:35,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:20:35,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:20:35,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:20:35,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:20:35,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:20:35,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:20:35,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:20:35,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:20:35,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:20:35,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:20:35,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:20:35,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:20:35,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:20:35,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:20:35,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:20:35,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:20:35,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:20:35,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:20:35,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:20:35,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:20:35,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:20:35,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:20:35,793 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 17:20:35,809 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:20:35,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:20:35,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:20:35,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:20:35,811 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:20:35,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:20:35,811 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:20:35,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:20:35,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:20:35,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:20:35,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:20:35,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:20:35,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:20:35,813 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:20:35,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:20:35,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:20:35,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:20:35,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:20:35,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:20:35,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:20:35,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:20:35,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:20:35,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:20:35,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:20:35,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:20:35,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:20:35,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:35,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:20:35,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:20:35,816 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 17:20:36,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:20:36,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:20:36,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:20:36,130 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:20:36,130 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:20:36,131 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-21 17:20:36,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ce55488/9a81d5f758e44e3e935e67f44bd19db7/FLAG6957fc27d [2020-07-21 17:20:36,646 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:20:36,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-21 17:20:36,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ce55488/9a81d5f758e44e3e935e67f44bd19db7/FLAG6957fc27d [2020-07-21 17:20:37,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ce55488/9a81d5f758e44e3e935e67f44bd19db7 [2020-07-21 17:20:37,067 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:20:37,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:20:37,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:20:37,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:20:37,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:20:37,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7209254e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37, skipping insertion in model container [2020-07-21 17:20:37,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:20:37,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:20:37,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:20:37,337 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:20:37,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:20:37,373 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:20:37,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37 WrapperNode [2020-07-21 17:20:37,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:20:37,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:20:37,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:20:37,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:20:37,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (1/1) ... [2020-07-21 17:20:37,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:20:37,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:20:37,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:20:37,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:20:37,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (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 17:20:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:20:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:20:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:20:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 17:20:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:20:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:20:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:20:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:20:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:20:37,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 17:20:37,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:20:37,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:20:37,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:20:37,760 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:20:37,760 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 17:20:37,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:20:37 BoogieIcfgContainer [2020-07-21 17:20:37,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:20:37,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:20:37,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:20:37,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:20:37,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:20:37" (1/3) ... [2020-07-21 17:20:37,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4f67d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:20:37, skipping insertion in model container [2020-07-21 17:20:37,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:37" (2/3) ... [2020-07-21 17:20:37,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4f67d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:20:37, skipping insertion in model container [2020-07-21 17:20:37,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:20:37" (3/3) ... [2020-07-21 17:20:37,773 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-07-21 17:20:37,784 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:20:37,795 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:20:37,811 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:20:37,842 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:20:37,842 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:20:37,842 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:20:37,842 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:20:37,843 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:20:37,843 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:20:37,843 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:20:37,843 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:20:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 17:20:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 17:20:37,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:37,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:37,877 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-07-21 17:20:37,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:37,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683373450] [2020-07-21 17:20:37,898 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 17:20:37,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:37,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 17:20:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:20:38,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:20:38,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683373450] [2020-07-21 17:20:38,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:20:38,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 17:20:38,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291267149] [2020-07-21 17:20:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 17:20:38,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 17:20:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:20:38,038 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-21 17:20:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:38,067 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-07-21 17:20:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 17:20:38,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 17:20:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:38,079 INFO L225 Difference]: With dead ends: 43 [2020-07-21 17:20:38,079 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 17:20:38,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:20:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 17:20:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 17:20:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 17:20:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-07-21 17:20:38,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-07-21 17:20:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:38,127 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-07-21 17:20:38,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 17:20:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-07-21 17:20:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 17:20:38,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:38,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:38,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:38,343 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:38,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1082567597, now seen corresponding path program 1 times [2020-07-21 17:20:38,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:38,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849892465] [2020-07-21 17:20:38,345 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 17:20:38,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:20:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:20:38,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:20:38,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849892465] [2020-07-21 17:20:38,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:20:38,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:20:38,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906999048] [2020-07-21 17:20:38,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:20:38,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:38,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:20:38,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:20:38,468 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-07-21 17:20:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:38,568 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-07-21 17:20:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:20:38,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 17:20:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:38,570 INFO L225 Difference]: With dead ends: 33 [2020-07-21 17:20:38,570 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 17:20:38,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 17:20:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 17:20:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 17:20:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 17:20:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-07-21 17:20:38,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 10 [2020-07-21 17:20:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:38,590 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-07-21 17:20:38,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:20:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-07-21 17:20:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 17:20:38,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:38,591 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:38,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:38,805 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:38,806 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-07-21 17:20:38,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:38,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362964501] [2020-07-21 17:20:38,808 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 17:20:38,839 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:38,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:20:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:20:38,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:20:38,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362964501] [2020-07-21 17:20:38,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:20:38,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:20:38,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334077050] [2020-07-21 17:20:38,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:20:38,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:20:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:20:38,893 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 5 states. [2020-07-21 17:20:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:39,009 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-07-21 17:20:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:20:39,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 17:20:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:39,013 INFO L225 Difference]: With dead ends: 37 [2020-07-21 17:20:39,013 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 17:20:39,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 17:20:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 17:20:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 17:20:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 17:20:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-21 17:20:39,024 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-07-21 17:20:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:39,025 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-21 17:20:39,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:20:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-21 17:20:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 17:20:39,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:39,026 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:39,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:39,240 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-07-21 17:20:39,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:39,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703181120] [2020-07-21 17:20:39,243 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 17:20:39,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:39,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:39,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:20:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:20:39,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:20:39,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703181120] [2020-07-21 17:20:39,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:20:39,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:20:39,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078210227] [2020-07-21 17:20:39,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:20:39,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:39,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:20:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:20:39,333 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-07-21 17:20:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:39,413 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-07-21 17:20:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:20:39,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 17:20:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:39,415 INFO L225 Difference]: With dead ends: 41 [2020-07-21 17:20:39,415 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 17:20:39,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 17:20:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 17:20:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 17:20:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 17:20:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 17:20:39,426 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-07-21 17:20:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:39,426 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 17:20:39,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:20:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 17:20:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 17:20:39,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:39,428 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:39,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:39,633 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash -984989960, now seen corresponding path program 1 times [2020-07-21 17:20:39,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:39,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855867758] [2020-07-21 17:20:39,636 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 17:20:39,675 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:20:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 17:20:39,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:20:39,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:20:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 17:20:39,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855867758] [2020-07-21 17:20:39,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 17:20:39,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-07-21 17:20:39,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812582662] [2020-07-21 17:20:39,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:20:39,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:39,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:20:39,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:20:39,852 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-07-21 17:20:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:39,931 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 17:20:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:20:39,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-21 17:20:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:39,934 INFO L225 Difference]: With dead ends: 42 [2020-07-21 17:20:39,934 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 17:20:39,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:20:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 17:20:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 17:20:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 17:20:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-21 17:20:39,953 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2020-07-21 17:20:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:39,953 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-21 17:20:39,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:20:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-21 17:20:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 17:20:39,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:39,955 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:40,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:40,170 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 2 times [2020-07-21 17:20:40,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:40,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665579836] [2020-07-21 17:20:40,172 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 17:20:40,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:40,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 17:20:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 17:20:40,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:20:40,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:20:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 17:20:40,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665579836] [2020-07-21 17:20:40,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:20:40,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 17:20:40,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659063238] [2020-07-21 17:20:40,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:20:40,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:20:40,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:20:40,367 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-07-21 17:20:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:50,887 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-07-21 17:20:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 17:20:50,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-21 17:20:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:50,890 INFO L225 Difference]: With dead ends: 74 [2020-07-21 17:20:50,890 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 17:20:50,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-21 17:20:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 17:20:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-07-21 17:20:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 17:20:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-07-21 17:20:50,908 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 32 [2020-07-21 17:20:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:50,909 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-07-21 17:20:50,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:20:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-07-21 17:20:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 17:20:50,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:50,911 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:51,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:51,126 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:51,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 3 times [2020-07-21 17:20:51,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:51,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564884291] [2020-07-21 17:20:51,128 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 17:20:51,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 17:20:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 17:20:51,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:20:51,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:20:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 17:20:51,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564884291] [2020-07-21 17:20:51,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 17:20:51,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2020-07-21 17:20:51,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651806910] [2020-07-21 17:20:51,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:20:51,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:20:51,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:20:51,464 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 5 states. [2020-07-21 17:20:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:51,587 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-07-21 17:20:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:20:51,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-07-21 17:20:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:51,590 INFO L225 Difference]: With dead ends: 76 [2020-07-21 17:20:51,590 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 17:20:51,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:20:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 17:20:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 17:20:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 17:20:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-07-21 17:20:51,608 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 54 [2020-07-21 17:20:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:51,609 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-07-21 17:20:51,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:20:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-07-21 17:20:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 17:20:51,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:20:51,613 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:20:51,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:51,817 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:20:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:20:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1996269958, now seen corresponding path program 4 times [2020-07-21 17:20:51,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:20:51,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645470949] [2020-07-21 17:20:51,820 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 17:20:51,880 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:20:51,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:20:51,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 17:20:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:20:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-21 17:20:52,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:20:52,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:20:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-21 17:20:52,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645470949] [2020-07-21 17:20:52,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:20:52,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 17:20:52,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24272072] [2020-07-21 17:20:52,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 17:20:52,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 17:20:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 17:20:52,523 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 14 states. [2020-07-21 17:20:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:59,572 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-07-21 17:20:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 17:20:59,575 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-07-21 17:20:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:59,576 INFO L225 Difference]: With dead ends: 81 [2020-07-21 17:20:59,576 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 17:20:59,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-07-21 17:20:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 17:20:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 17:20:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 17:20:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 17:20:59,578 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2020-07-21 17:20:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:59,579 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 17:20:59,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 17:20:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 17:20:59,579 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 17:20:59,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:59,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 17:21:10,589 WARN L193 SmtUtils]: Spent 10.57 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 17:21:22,425 WARN L193 SmtUtils]: Spent 11.83 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 17:21:33,075 WARN L193 SmtUtils]: Spent 10.65 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-21 17:21:44,734 WARN L193 SmtUtils]: Spent 11.66 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-21 17:21:57,819 WARN L193 SmtUtils]: Spent 13.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 17:21:58,495 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-21 17:22:10,599 WARN L193 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 17:22:10,602 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 17:22:10,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:22:10,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:22:10,603 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 17:22:10,603 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 17:22:10,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 17:22:10,603 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-07-21 17:22:10,603 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 17:22:10,603 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-21 17:22:10,604 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-21 17:22:10,604 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2020-07-21 17:22:10,604 INFO L268 CegarLoopResult]: For program point L29(lines 26 38) no Hoare annotation was computed. [2020-07-21 17:22:10,604 INFO L264 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 17:22:10,604 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 17:22:10,605 INFO L264 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 17:22:10,605 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2020-07-21 17:22:10,605 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 38) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 17:22:10,605 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 38) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 17:22:10,605 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2020-07-21 17:22:10,606 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-21 17:22:10,606 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (or (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= 1 main_~s~0) (= 1 main_~t~0))) [2020-07-21 17:22:10,606 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 17:22:10,606 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 17:22:10,607 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-21 17:22:10,607 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-21 17:22:10,607 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 17:22:10,607 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 17:22:10,607 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-21 17:22:10,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:22:10 BoogieIcfgContainer [2020-07-21 17:22:10,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 17:22:10,623 INFO L168 Benchmark]: Toolchain (without parser) took 93554.31 ms. Allocated memory was 135.8 MB in the beginning and 254.3 MB in the end (delta: 118.5 MB). Free memory was 100.0 MB in the beginning and 218.5 MB in the end (delta: -118.5 MB). Peak memory consumption was 129.8 MB. Max. memory is 7.1 GB. [2020-07-21 17:22:10,624 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 17:22:10,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.55 ms. Allocated memory is still 135.8 MB. Free memory was 99.8 MB in the beginning and 90.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 17:22:10,625 INFO L168 Benchmark]: Boogie Preprocessor took 116.01 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 178.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-21 17:22:10,626 INFO L168 Benchmark]: RCFGBuilder took 273.48 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 165.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-21 17:22:10,627 INFO L168 Benchmark]: TraceAbstraction took 92855.60 ms. Allocated memory was 199.8 MB in the beginning and 254.3 MB in the end (delta: 54.5 MB). Free memory was 164.8 MB in the beginning and 218.5 MB in the end (delta: -53.7 MB). Peak memory consumption was 130.6 MB. Max. memory is 7.1 GB. [2020-07-21 17:22:10,631 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.55 ms. Allocated memory is still 135.8 MB. Free memory was 99.8 MB in the beginning and 90.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.01 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 178.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.48 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 165.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 92855.60 ms. Allocated memory was 199.8 MB in the beginning and 254.3 MB in the end (delta: 54.5 MB). Free memory was 164.8 MB in the beginning and 218.5 MB in the end (delta: -53.7 MB). Peak memory consumption was 130.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 26]: Loop Invariant Derived loop invariant: (t * t + t * 2 + 1 == s * 4 && a * 2 + 1 == t) && a * a + a * 2 + 1 == s - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.9s, OverallIterations: 8, TraceHistogramMax: 14, AutomataDifference: 18.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 70.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 56 SDslu, 568 SDs, 0 SdLazy, 432 SolverSat, 83 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 16.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 392 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 49 PreInvPairs, 87 NumberOfFragments, 213 HoareAnnotationTreeSize, 49 FomulaSimplifications, 207 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1064 FormulaSimplificationTreeSizeReductionInter, 70.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 251 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 435 ConstructedInterpolants, 0 QuantifiedInterpolants, 88480 SizeOfPredicates, 16 NumberOfNonLiveVariables, 583 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 1057/1162 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...