/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/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:34:02,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:34:02,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:34:02,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:34:02,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:34:02,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:34:02,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:34:02,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:34:02,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:34:02,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:34:02,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:34:02,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:34:02,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:34:02,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:34:02,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:34:02,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:34:02,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:34:02,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:34:02,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:34:02,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:34:02,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:34:02,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:34:02,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:34:02,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:34:02,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:34:02,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:34:02,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:34:02,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:34:02,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:34:02,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:34:02,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:34:02,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:34:02,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:34:02,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:34:02,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:34:02,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:34:02,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:34:02,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:34:02,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:34:02,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:34:02,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:34:02,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:34:02,969 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:34:02,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:34:02,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:34:02,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:34:02,972 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:34:02,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:34:02,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:34:02,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:34:02,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:34:02,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:34:02,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:34:02,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:34:02,974 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:34:02,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:34:02,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:34:02,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:34:02,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:34:02,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:34:02,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:34:02,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:34:02,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:34:02,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:34:02,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:34:02,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:34:02,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:34:02,977 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:34:03,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:34:03,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:34:03,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:34:03,474 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:34:03,475 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:34:03,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2020-12-21 21:34:03,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d0636c7/e3a98f7a5ce94bc9a5616f4b11bdde54/FLAG9b4d888ae [2020-12-21 21:34:04,147 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:34:04,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2020-12-21 21:34:04,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d0636c7/e3a98f7a5ce94bc9a5616f4b11bdde54/FLAG9b4d888ae [2020-12-21 21:34:04,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d0636c7/e3a98f7a5ce94bc9a5616f4b11bdde54 [2020-12-21 21:34:04,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:34:04,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:34:04,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:04,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:34:04,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:34:04,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:04,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@647317c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04, skipping insertion in model container [2020-12-21 21:34:04,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:04,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:34:04,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:34:04,808 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init7_ground-2.i[816,829] [2020-12-21 21:34:04,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:04,867 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:34:04,886 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init7_ground-2.i[816,829] [2020-12-21 21:34:04,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:04,947 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:34:04,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04 WrapperNode [2020-12-21 21:34:04,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:04,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:04,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:34:04,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:34:04,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:04,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:05,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:34:05,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:34:05,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:34:05,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... [2020-12-21 21:34:05,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:34:05,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:34:05,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:34:05,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:34:05,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:34:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:34:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:34:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:34:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:34:05,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:34:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:34:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:34:05,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:34:05,798 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-21 21:34:05,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:05 BoogieIcfgContainer [2020-12-21 21:34:05,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:34:05,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:34:05,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:34:05,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:34:05,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:34:04" (1/3) ... [2020-12-21 21:34:05,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763db1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:05, skipping insertion in model container [2020-12-21 21:34:05,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:04" (2/3) ... [2020-12-21 21:34:05,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763db1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:05, skipping insertion in model container [2020-12-21 21:34:05,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:05" (3/3) ... [2020-12-21 21:34:05,814 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2020-12-21 21:34:05,826 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:34:05,831 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:34:05,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:34:05,898 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:34:05,902 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:34:05,903 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:34:05,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:34:05,903 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:34:05,903 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:34:05,903 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:34:05,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:34:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-21 21:34:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:34:05,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:05,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:05,928 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash -495328290, now seen corresponding path program 1 times [2020-12-21 21:34:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:05,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635089610] [2020-12-21 21:34:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:34:06,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635089610] [2020-12-21 21:34:06,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:34:06,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:34:06,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146839055] [2020-12-21 21:34:06,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:34:06,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:34:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:06,156 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-12-21 21:34:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:06,243 INFO L93 Difference]: Finished difference Result 56 states and 100 transitions. [2020-12-21 21:34:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:34:06,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:34:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:06,254 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:34:06,255 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 21:34:06,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 21:34:06,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-21 21:34:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:34:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-21 21:34:06,299 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2020-12-21 21:34:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:06,300 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-21 21:34:06,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:34:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-21 21:34:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:34:06,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:06,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:06,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:34:06,302 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:06,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1838625458, now seen corresponding path program 1 times [2020-12-21 21:34:06,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:06,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730641795] [2020-12-21 21:34:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:34:06,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730641795] [2020-12-21 21:34:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440925998] [2020-12-21 21:34:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:34:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:34:06,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:06,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:34:06,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656036249] [2020-12-21 21:34:06,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:34:06,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:06,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:34:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:06,665 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2020-12-21 21:34:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:06,848 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-12-21 21:34:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:34:06,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-21 21:34:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:06,853 INFO L225 Difference]: With dead ends: 61 [2020-12-21 21:34:06,855 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:34:06,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:06,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:34:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-21 21:34:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:34:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-21 21:34:06,884 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 26 [2020-12-21 21:34:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:06,885 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-21 21:34:06,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:34:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-21 21:34:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:34:06,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:06,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:07,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:34:07,103 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 469832922, now seen corresponding path program 2 times [2020-12-21 21:34:07,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:07,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489620704] [2020-12-21 21:34:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:34:07,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489620704] [2020-12-21 21:34:07,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319354678] [2020-12-21 21:34:07,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:07,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:07,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:07,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:34:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:34:07,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:07,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:34:07,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380920946] [2020-12-21 21:34:07,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:34:07,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:07,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:34:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:07,412 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-12-21 21:34:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:07,569 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-21 21:34:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:34:07,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-21 21:34:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:07,572 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:34:07,573 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:34:07,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:34:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-21 21:34:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:34:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-21 21:34:07,592 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2020-12-21 21:34:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:07,592 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-21 21:34:07,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:34:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-21 21:34:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:34:07,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:07,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:07,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:07,812 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash -467565902, now seen corresponding path program 3 times [2020-12-21 21:34:07,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:07,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356131285] [2020-12-21 21:34:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:34:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356131285] [2020-12-21 21:34:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163337076] [2020-12-21 21:34:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:08,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:34:08,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:34:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:34:08,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:08,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:34:08,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379595189] [2020-12-21 21:34:08,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:34:08,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:34:08,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:08,144 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 7 states. [2020-12-21 21:34:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:08,268 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2020-12-21 21:34:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:34:08,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-21 21:34:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:08,269 INFO L225 Difference]: With dead ends: 87 [2020-12-21 21:34:08,269 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:34:08,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:34:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-21 21:34:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:34:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-12-21 21:34:08,278 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 40 [2020-12-21 21:34:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:08,278 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-12-21 21:34:08,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:34:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-12-21 21:34:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:34:08,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:08,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:08,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:08,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1915847130, now seen corresponding path program 4 times [2020-12-21 21:34:08,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:08,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245720207] [2020-12-21 21:34:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-21 21:34:08,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245720207] [2020-12-21 21:34:08,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065624540] [2020-12-21 21:34:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:08,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:08,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:34:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-21 21:34:08,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:08,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:34:08,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712442275] [2020-12-21 21:34:08,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:34:08,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:08,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:34:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:08,862 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2020-12-21 21:34:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:09,007 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-12-21 21:34:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:34:09,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-12-21 21:34:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:09,009 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:34:09,009 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:34:09,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:34:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-21 21:34:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-21 21:34:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-12-21 21:34:09,019 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 47 [2020-12-21 21:34:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:09,019 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-12-21 21:34:09,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:34:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-12-21 21:34:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:34:09,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:09,021 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:09,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:09,236 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2119946930, now seen corresponding path program 5 times [2020-12-21 21:34:09,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:09,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21791807] [2020-12-21 21:34:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:34:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21791807] [2020-12-21 21:34:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704436280] [2020-12-21 21:34:09,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:12,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:34:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:34:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:34:13,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:13,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:34:13,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93672558] [2020-12-21 21:34:13,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:34:13,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:34:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:13,006 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 9 states. [2020-12-21 21:34:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:13,160 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2020-12-21 21:34:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:34:13,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-21 21:34:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:13,161 INFO L225 Difference]: With dead ends: 113 [2020-12-21 21:34:13,161 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:34:13,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:34:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-21 21:34:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:34:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-12-21 21:34:13,171 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 54 [2020-12-21 21:34:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:13,171 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-12-21 21:34:13,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:34:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-12-21 21:34:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:34:13,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:13,172 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:13,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:34:13,374 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:13,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1499557594, now seen corresponding path program 6 times [2020-12-21 21:34:13,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:13,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286661961] [2020-12-21 21:34:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-21 21:34:13,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286661961] [2020-12-21 21:34:13,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770646653] [2020-12-21 21:34:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:14,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:34:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:34:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-21 21:34:14,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:14,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:34:14,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286991983] [2020-12-21 21:34:14,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:34:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:34:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:14,830 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2020-12-21 21:34:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:14,988 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-12-21 21:34:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:34:14,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-21 21:34:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:14,991 INFO L225 Difference]: With dead ends: 126 [2020-12-21 21:34:14,991 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:34:14,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:34:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-21 21:34:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 21:34:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-12-21 21:34:15,001 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 61 [2020-12-21 21:34:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:15,002 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-12-21 21:34:15,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:34:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-12-21 21:34:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:34:15,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:15,003 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:15,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:15,213 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash -664919374, now seen corresponding path program 7 times [2020-12-21 21:34:15,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:15,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999228356] [2020-12-21 21:34:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-21 21:34:15,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999228356] [2020-12-21 21:34:15,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920666800] [2020-12-21 21:34:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:34:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-21 21:34:15,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:15,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:34:15,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611861334] [2020-12-21 21:34:15,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:34:15,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:15,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:34:15,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:15,505 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 11 states. [2020-12-21 21:34:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:15,643 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2020-12-21 21:34:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:34:15,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-12-21 21:34:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:15,644 INFO L225 Difference]: With dead ends: 139 [2020-12-21 21:34:15,644 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 21:34:15,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 21:34:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-21 21:34:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 21:34:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-12-21 21:34:15,654 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 68 [2020-12-21 21:34:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:15,654 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-12-21 21:34:15,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:34:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-12-21 21:34:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:34:15,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:15,656 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:15,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:15,870 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:15,871 INFO L82 PathProgramCache]: Analyzing trace with hash 184081370, now seen corresponding path program 8 times [2020-12-21 21:34:15,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:15,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051955562] [2020-12-21 21:34:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-21 21:34:16,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051955562] [2020-12-21 21:34:16,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434760131] [2020-12-21 21:34:16,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:16,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:16,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:34:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-21 21:34:16,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:16,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:34:16,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345377236] [2020-12-21 21:34:16,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:34:16,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:16,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:34:16,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:16,354 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 12 states. [2020-12-21 21:34:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:16,529 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-12-21 21:34:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:34:16,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-12-21 21:34:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:16,530 INFO L225 Difference]: With dead ends: 152 [2020-12-21 21:34:16,530 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 21:34:16,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 21:34:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-21 21:34:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:34:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-21 21:34:16,540 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 75 [2020-12-21 21:34:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:16,540 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-21 21:34:16,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:34:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-21 21:34:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:34:16,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:16,542 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:16,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:34:16,756 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:16,757 INFO L82 PathProgramCache]: Analyzing trace with hash -96439630, now seen corresponding path program 9 times [2020-12-21 21:34:16,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:16,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277878030] [2020-12-21 21:34:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-12-21 21:34:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277878030] [2020-12-21 21:34:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396769866] [2020-12-21 21:34:16,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:27,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:34:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:34:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-12-21 21:34:27,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:27,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:34:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668026498] [2020-12-21 21:34:27,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:34:27,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:34:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:27,901 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 13 states. [2020-12-21 21:34:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:28,097 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2020-12-21 21:34:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:34:28,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-12-21 21:34:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:28,099 INFO L225 Difference]: With dead ends: 165 [2020-12-21 21:34:28,099 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:34:28,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:34:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-21 21:34:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:34:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-12-21 21:34:28,107 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 82 [2020-12-21 21:34:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:28,107 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-12-21 21:34:28,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:34:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-12-21 21:34:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:34:28,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:28,108 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:28,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:28,323 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1268791078, now seen corresponding path program 10 times [2020-12-21 21:34:28,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:28,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718441029] [2020-12-21 21:34:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:34:28,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718441029] [2020-12-21 21:34:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730319118] [2020-12-21 21:34:28,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:34:28,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:34:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:34:28,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:28,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:34:28,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669527058] [2020-12-21 21:34:28,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:34:28,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:34:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:28,714 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 14 states. [2020-12-21 21:34:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:28,921 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2020-12-21 21:34:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:34:28,922 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-12-21 21:34:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:28,923 INFO L225 Difference]: With dead ends: 178 [2020-12-21 21:34:28,924 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:34:28,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:34:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-21 21:34:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 21:34:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2020-12-21 21:34:28,932 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 89 [2020-12-21 21:34:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:28,932 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2020-12-21 21:34:28,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:34:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2020-12-21 21:34:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:34:28,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:28,933 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:29,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:29,147 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash -669334862, now seen corresponding path program 11 times [2020-12-21 21:34:29,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:29,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38294530] [2020-12-21 21:34:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-12-21 21:34:29,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38294530] [2020-12-21 21:34:29,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392877762] [2020-12-21 21:34:29,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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