/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:33:59,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:33:59,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:33:59,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:33:59,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:33:59,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:33:59,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:33:59,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:33:59,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:33:59,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:33:59,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:33:59,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:33:59,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:33:59,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:33:59,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:33:59,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:33:59,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:33:59,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:33:59,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:33:59,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:33:59,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:33:59,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:33:59,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:33:59,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:33:59,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:33:59,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:33:59,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:33:59,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:33:59,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:33:59,914 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:33:59,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:33:59,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:33:59,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:33:59,920 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:33:59,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:33:59,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:33:59,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:33:59,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:33:59,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:33:59,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:33:59,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:33:59,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:33:59,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:33:59,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:33:59,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:33:59,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:33:59,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:33:59,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:33:59,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:33:59,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:33:59,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:33:59,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:33:59,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:33:59,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:33:59,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:34:00,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:34:00,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:34:00,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:34:00,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:34:00,368 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:34:00,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i [2020-12-23 07:34:00,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a31250c58/4034a1117e4c40fe88163a2ede2682df/FLAG0fe7796b1 [2020-12-23 07:34:01,068 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:34:01,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i [2020-12-23 07:34:01,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a31250c58/4034a1117e4c40fe88163a2ede2682df/FLAG0fe7796b1 [2020-12-23 07:34:01,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a31250c58/4034a1117e4c40fe88163a2ede2682df [2020-12-23 07:34:01,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:34:01,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:34:01,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:01,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:34:01,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:34:01,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5701c0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01, skipping insertion in model container [2020-12-23 07:34:01,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:34:01,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:34:01,605 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:01,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:01,632 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:34:01,646 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:01,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:01,670 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:34:01,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01 WrapperNode [2020-12-23 07:34:01,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:01,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:01,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:34:01,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:34:01,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:01,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:34:01,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:34:01,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:34:01,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... [2020-12-23 07:34:01,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:34:01,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:34:01,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:34:01,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:34:01,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:34:01,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:34:01,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:34:01,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:34:01,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:34:02,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:34:02,135 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 07:34:02,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:02 BoogieIcfgContainer [2020-12-23 07:34:02,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:34:02,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:34:02,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:34:02,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:34:02,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:34:01" (1/3) ... [2020-12-23 07:34:02,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2688ab4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:02, skipping insertion in model container [2020-12-23 07:34:02,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:01" (2/3) ... [2020-12-23 07:34:02,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2688ab4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:02, skipping insertion in model container [2020-12-23 07:34:02,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:02" (3/3) ... [2020-12-23 07:34:02,168 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound50.i [2020-12-23 07:34:02,185 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:34:02,195 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:34:02,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:34:02,270 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:34:02,271 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:34:02,271 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:34:02,271 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:34:02,271 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:34:02,271 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:34:02,272 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:34:02,272 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:34:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 07:34:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:34:02,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:02,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:02,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2020-12-23 07:34:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:02,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803906690] [2020-12-23 07:34:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:02,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803906690] [2020-12-23 07:34:02,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:02,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:34:02,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055961519] [2020-12-23 07:34:02,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:34:02,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:34:02,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:02,565 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 07:34:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:02,584 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-12-23 07:34:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:34:02,586 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 07:34:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:02,607 INFO L225 Difference]: With dead ends: 37 [2020-12-23 07:34:02,607 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:34:02,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:34:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 07:34:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:34:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 07:34:02,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-23 07:34:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:02,659 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 07:34:02,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:34:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 07:34:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:34:02,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:02,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:02,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:34:02,662 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:02,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2020-12-23 07:34:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:02,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050110045] [2020-12-23 07:34:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:02,719 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:02,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438084497] [2020-12-23 07:34:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:34:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:02,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050110045] [2020-12-23 07:34:02,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:02,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438084497] [2020-12-23 07:34:02,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:02,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:34:02,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136035280] [2020-12-23 07:34:02,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:34:02,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:34:02,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:34:02,980 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-12-23 07:34:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:03,202 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-23 07:34:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:34:03,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 07:34:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:03,204 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:34:03,204 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:34:03,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:34:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:34:03,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-23 07:34:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:34:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 07:34:03,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2020-12-23 07:34:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:03,212 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 07:34:03,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:34:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 07:34:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:34:03,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:03,213 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:03,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:34:03,427 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2020-12-23 07:34:03,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:03,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870248872] [2020-12-23 07:34:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:03,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:03,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616173770] [2020-12-23 07:34:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:34:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:03,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870248872] [2020-12-23 07:34:03,608 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:03,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616173770] [2020-12-23 07:34:03,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:03,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:34:03,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665509196] [2020-12-23 07:34:03,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:34:03,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:34:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:34:03,611 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-12-23 07:34:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:03,920 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 07:34:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:34:03,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-23 07:34:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:03,922 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:34:03,922 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:34:03,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:34:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:34:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-23 07:34:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:34:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 07:34:03,929 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2020-12-23 07:34:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:03,930 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 07:34:03,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:34:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 07:34:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:34:03,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:03,931 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:04,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:04,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash -580289007, now seen corresponding path program 1 times [2020-12-23 07:34:04,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:04,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420702788] [2020-12-23 07:34:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:04,160 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:04,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770079106] [2020-12-23 07:34:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:04,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420702788] [2020-12-23 07:34:04,227 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:04,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770079106] [2020-12-23 07:34:04,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:04,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:04,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506895795] [2020-12-23 07:34:04,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:34:04,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:04,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:34:04,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:04,229 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-12-23 07:34:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:04,251 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-23 07:34:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:34:04,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-23 07:34:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:04,253 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:34:04,253 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:34:04,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:34:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:34:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:34:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 07:34:04,258 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2020-12-23 07:34:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:04,259 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 07:34:04,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:34:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 07:34:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:34:04,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:04,260 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:04,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:04,475 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash 505525932, now seen corresponding path program 1 times [2020-12-23 07:34:04,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:04,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79296695] [2020-12-23 07:34:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:04,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:04,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594883392] [2020-12-23 07:34:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:34:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:04,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79296695] [2020-12-23 07:34:04,761 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:04,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594883392] [2020-12-23 07:34:04,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:04,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:34:04,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882349053] [2020-12-23 07:34:04,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:34:04,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:34:04,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:04,764 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2020-12-23 07:34:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:05,355 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-23 07:34:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:34:05,356 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 07:34:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:05,357 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:34:05,357 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:34:05,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:34:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:34:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-23 07:34:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:34:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 07:34:05,364 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2020-12-23 07:34:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:05,364 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 07:34:05,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:34:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 07:34:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:34:05,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:05,366 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:05,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:05,581 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash 296629383, now seen corresponding path program 2 times [2020-12-23 07:34:05,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:05,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50294905] [2020-12-23 07:34:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:05,597 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:05,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664460830] [2020-12-23 07:34:05,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:05,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:34:05,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:34:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:05,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50294905] [2020-12-23 07:34:05,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:05,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664460830] [2020-12-23 07:34:05,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:05,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:34:05,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306855655] [2020-12-23 07:34:05,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:34:05,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:05,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:34:05,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:05,838 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 10 states. [2020-12-23 07:34:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:06,120 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-23 07:34:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:34:06,121 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 07:34:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:06,122 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:34:06,122 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:34:06,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:34:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:34:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-12-23 07:34:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:34:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-12-23 07:34:06,130 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 17 [2020-12-23 07:34:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:06,130 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-12-23 07:34:06,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:34:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-12-23 07:34:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:34:06,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:06,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:06,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:34:06,346 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1023135329, now seen corresponding path program 3 times [2020-12-23 07:34:06,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:06,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530314297] [2020-12-23 07:34:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:06,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:06,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671234565] [2020-12-23 07:34:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:06,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:34:06,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:34:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:06,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530314297] [2020-12-23 07:34:06,620 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:06,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671234565] [2020-12-23 07:34:06,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:06,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:34:06,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595198131] [2020-12-23 07:34:06,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:34:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:06,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:34:06,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:06,623 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-12-23 07:34:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:06,685 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-23 07:34:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:34:06,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 07:34:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:06,686 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:34:06,686 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:34:06,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:34:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:34:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:34:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-23 07:34:06,693 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 19 [2020-12-23 07:34:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:06,693 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-23 07:34:06,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:34:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-23 07:34:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:34:06,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:06,694 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:06,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:06,908 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1410508706, now seen corresponding path program 4 times [2020-12-23 07:34:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:06,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407529167] [2020-12-23 07:34:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:06,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:06,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62208531] [2020-12-23 07:34:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:07,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:34:07,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:34:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:07,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407529167] [2020-12-23 07:34:07,207 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:07,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62208531] [2020-12-23 07:34:07,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:07,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:34:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18344708] [2020-12-23 07:34:07,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:34:07,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:34:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:34:07,209 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 11 states. [2020-12-23 07:34:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:07,969 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-12-23 07:34:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:34:07,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-12-23 07:34:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:07,973 INFO L225 Difference]: With dead ends: 76 [2020-12-23 07:34:07,973 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 07:34:07,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:34:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 07:34:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 35. [2020-12-23 07:34:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:34:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-23 07:34:07,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 19 [2020-12-23 07:34:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:07,982 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-23 07:34:07,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:34:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-23 07:34:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:34:07,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:07,983 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:08,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:08,197 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2014308028, now seen corresponding path program 5 times [2020-12-23 07:34:08,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:08,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867996332] [2020-12-23 07:34:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:08,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:08,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593970594] [2020-12-23 07:34:08,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:08,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:34:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:08,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:34:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:08,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867996332] [2020-12-23 07:34:08,954 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:08,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593970594] [2020-12-23 07:34:08,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:08,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:34:08,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337078344] [2020-12-23 07:34:08,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:34:08,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:34:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:34:08,961 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 12 states. [2020-12-23 07:34:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:09,461 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-23 07:34:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:34:09,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-23 07:34:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:09,463 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:34:09,463 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:34:09,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:34:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:34:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-12-23 07:34:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:34:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 07:34:09,473 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 21 [2020-12-23 07:34:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:09,473 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 07:34:09,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:34:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 07:34:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:34:09,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:09,474 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:09,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:34:09,679 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1893285891, now seen corresponding path program 6 times [2020-12-23 07:34:09,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:09,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43614009] [2020-12-23 07:34:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:09,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:09,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410294799] [2020-12-23 07:34:09,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:09,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:34:09,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:34:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:34:10,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43614009] [2020-12-23 07:34:10,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:10,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410294799] [2020-12-23 07:34:10,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:10,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:34:10,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633259817] [2020-12-23 07:34:10,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:34:10,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:34:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:34:10,143 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2020-12-23 07:34:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:10,412 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-12-23 07:34:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:34:10,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 07:34:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:10,413 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:34:10,413 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:34:10,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:34:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:34:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2020-12-23 07:34:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:34:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-23 07:34:10,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 21 [2020-12-23 07:34:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:10,422 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-23 07:34:10,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:34:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-23 07:34:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:34:10,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:10,423 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:10,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:10,633 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:10,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1048532055, now seen corresponding path program 7 times [2020-12-23 07:34:10,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:10,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857470400] [2020-12-23 07:34:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:10,646 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:10,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446751586] [2020-12-23 07:34:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:10,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:34:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:11,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857470400] [2020-12-23 07:34:11,419 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:11,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446751586] [2020-12-23 07:34:11,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:11,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 07:34:11,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511356549] [2020-12-23 07:34:11,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:34:11,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:11,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:34:11,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:34:11,421 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 14 states. [2020-12-23 07:34:12,316 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2020-12-23 07:34:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:12,777 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-12-23 07:34:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:34:12,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-12-23 07:34:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:12,779 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:34:12,779 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 07:34:12,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:34:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 07:34:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-12-23 07:34:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:34:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-12-23 07:34:12,802 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 23 [2020-12-23 07:34:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:12,802 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-12-23 07:34:12,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:34:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-12-23 07:34:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:34:12,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:12,807 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:13,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:13,008 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1791789455, now seen corresponding path program 8 times [2020-12-23 07:34:13,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:13,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251888506] [2020-12-23 07:34:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:13,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:13,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109089324] [2020-12-23 07:34:13,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:13,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:34:13,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:34:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:13,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251888506] [2020-12-23 07:34:13,463 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:13,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109089324] [2020-12-23 07:34:13,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:13,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:34:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123017719] [2020-12-23 07:34:13,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:34:13,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:13,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:34:13,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:34:13,467 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 8 states. [2020-12-23 07:34:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:13,559 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-12-23 07:34:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:34:13,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-23 07:34:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:13,560 INFO L225 Difference]: With dead ends: 75 [2020-12-23 07:34:13,560 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 07:34:13,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:34:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 07:34:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 07:34:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:34:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-23 07:34:13,567 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 25 [2020-12-23 07:34:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:13,568 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-23 07:34:13,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:34:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-23 07:34:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:34:13,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:13,569 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:13,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:34:13,784 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash 650757938, now seen corresponding path program 9 times [2020-12-23 07:34:13,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:13,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813024942] [2020-12-23 07:34:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:13,797 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:13,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308123805] [2020-12-23 07:34:13,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:17,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:34:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:17,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:34:17,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:17,564 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:17,739 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:19,484 WARN L197 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-12-23 07:34:20,970 WARN L197 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-23 07:34:22,883 WARN L197 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-12-23 07:34:23,096 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:23,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2020-12-23 07:34:26,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813024942] [2020-12-23 07:34:26,008 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:26,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308123805] [2020-12-23 07:34:26,008 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 07:34:26,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:26,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:34:26,008 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:34:26,009 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:34:26,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:34:26,244 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:34:26,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:34:26 BoogieIcfgContainer [2020-12-23 07:34:26,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:34:26,245 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:34:26,245 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:34:26,245 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:34:26,246 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:02" (3/4) ... [2020-12-23 07:34:26,250 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:34:26,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:34:26,255 INFO L168 Benchmark]: Toolchain (without parser) took 24832.09 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.2 MB in the beginning and 167.3 MB in the end (delta: -41.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:26,258 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:34:26,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:26,259 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:26,259 INFO L168 Benchmark]: Boogie Preprocessor took 23.62 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.6 MB in the end (delta: 952.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:26,260 INFO L168 Benchmark]: RCFGBuilder took 405.64 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 132.8 MB in the end (delta: -19.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:26,261 INFO L168 Benchmark]: TraceAbstraction took 24100.74 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.2 MB in the beginning and 167.8 MB in the end (delta: -35.6 MB). Peak memory consumption was 133.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:26,264 INFO L168 Benchmark]: Witness Printer took 5.34 ms. Allocated memory is still 218.1 MB. Free memory was 167.8 MB in the beginning and 167.3 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:34:26,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.62 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.6 MB in the end (delta: 952.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 405.64 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 132.8 MB in the end (delta: -19.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24100.74 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.2 MB in the beginning and 167.8 MB in the end (delta: -35.6 MB). Peak memory consumption was 133.7 MB. Max. memory is 8.0 GB. * Witness Printer took 5.34 ms. Allocated memory is still 218.1 MB. Free memory was 167.8 MB in the beginning and 167.3 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 23.9s, OverallIterations: 13, TraceHistogramMax: 5, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 449 SDslu, 463 SDs, 0 SdLazy, 1332 SolverSat, 216 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 247 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=11, 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, 12 MinimizatonAttempts, 109 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 201 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 44775 SizeOfPredicates, 68 NumberOfNonLiveVariables, 817 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 35/120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...