/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:04:16,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:04:16,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:04:17,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:04:17,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:04:17,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:04:17,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:04:17,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:04:17,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:04:17,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:04:17,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:04:17,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:04:17,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:04:17,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:04:17,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:04:17,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:04:17,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:04:17,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:04:17,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:04:17,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:04:17,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:04:17,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:04:17,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:04:17,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:04:17,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:04:17,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:04:17,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:04:17,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:04:17,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:04:17,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:04:17,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:04:17,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:04:17,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:04:17,189 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:04:17,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:04:17,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:04:17,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:04:17,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:04:17,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:04:17,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:04:17,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:04:17,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:04:17,191 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:04:17,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:04:17,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:04:17,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:04:17,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:04:17,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:04:17,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:04:17,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:04:17,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:04:17,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:04:17,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:04:17,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:04:17,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:04:17,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:04:17,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:04:17,195 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:04:17,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:04:17,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:04:17,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:04:17,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:04:17,598 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:04:17,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2021-02-21 16:04:17,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd342e4da/191be9aa89e74ca5b40c03a25df88539/FLAG91584a7c6 [2021-02-21 16:04:18,204 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:04:18,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2021-02-21 16:04:18,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd342e4da/191be9aa89e74ca5b40c03a25df88539/FLAG91584a7c6 [2021-02-21 16:04:18,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd342e4da/191be9aa89e74ca5b40c03a25df88539 [2021-02-21 16:04:18,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:04:18,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:04:18,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:04:18,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:04:18,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:04:18,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@340c430f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18, skipping insertion in model container [2021-02-21 16:04:18,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:04:18,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:04:18,761 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c[528,541] [2021-02-21 16:04:18,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:04:18,774 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:04:18,790 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c[528,541] [2021-02-21 16:04:18,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:04:18,807 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:04:18,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18 WrapperNode [2021-02-21 16:04:18,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:04:18,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:04:18,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:04:18,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:04:18,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (1/1) ... [2021-02-21 16:04:18,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:04:18,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:04:18,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:04:18,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:04:18,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (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 [2021-02-21 16:04:18,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:04:18,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:04:18,982 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:04:18,982 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-21 16:04:18,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:04:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:04:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:04:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:04:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:04:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:04:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-21 16:04:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:04:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:04:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:04:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:04:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:04:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:04:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:04:19,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:04:19,217 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:04:19,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:04:19 BoogieIcfgContainer [2021-02-21 16:04:19,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:04:19,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:04:19,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:04:19,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:04:19,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:04:18" (1/3) ... [2021-02-21 16:04:19,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d2a52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:04:19, skipping insertion in model container [2021-02-21 16:04:19,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:04:18" (2/3) ... [2021-02-21 16:04:19,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d2a52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:04:19, skipping insertion in model container [2021-02-21 16:04:19,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:04:19" (3/3) ... [2021-02-21 16:04:19,238 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2021-02-21 16:04:19,246 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:04:19,251 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:04:19,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:04:19,314 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:04:19,314 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:04:19,314 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:04:19,315 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:04:19,315 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:04:19,318 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:04:19,318 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:04:19,319 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:04:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-02-21 16:04:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:04:19,375 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:19,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:04:19,376 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash -211895392, now seen corresponding path program 1 times [2021-02-21 16:04:19,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:19,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231749593] [2021-02-21 16:04:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:19,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:19,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:19,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:19,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:19,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:19,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:19,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:19,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:19,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:19,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:19,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:19,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:19,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:19,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:19,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:19,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:04:19,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231749593] [2021-02-21 16:04:19,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:19,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:04:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745330001] [2021-02-21 16:04:19,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:04:19,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:19,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:04:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:04:19,943 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2021-02-21 16:04:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:20,154 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-02-21 16:04:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:04:20,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-21 16:04:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:20,166 INFO L225 Difference]: With dead ends: 34 [2021-02-21 16:04:20,167 INFO L226 Difference]: Without dead ends: 20 [2021-02-21 16:04:20,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:04:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-21 16:04:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-21 16:04:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-21 16:04:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-02-21 16:04:20,217 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2021-02-21 16:04:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:20,217 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-02-21 16:04:20,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:04:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-02-21 16:04:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:04:20,220 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:20,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:04:20,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:04:20,221 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:20,222 INFO L82 PathProgramCache]: Analyzing trace with hash -351670379, now seen corresponding path program 1 times [2021-02-21 16:04:20,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:20,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008222139] [2021-02-21 16:04:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-21 16:04:20,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008222139] [2021-02-21 16:04:20,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:20,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:04:20,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412229872] [2021-02-21 16:04:20,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:04:20,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:20,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:04:20,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:04:20,395 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2021-02-21 16:04:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:20,643 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-02-21 16:04:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:04:20,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-21 16:04:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:20,647 INFO L225 Difference]: With dead ends: 32 [2021-02-21 16:04:20,648 INFO L226 Difference]: Without dead ends: 24 [2021-02-21 16:04:20,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:04:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-02-21 16:04:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-02-21 16:04:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-21 16:04:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-02-21 16:04:20,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 21 [2021-02-21 16:04:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:20,666 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-02-21 16:04:20,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:04:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-02-21 16:04:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:04:20,668 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:20,668 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:04:20,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:04:20,670 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash -323041228, now seen corresponding path program 1 times [2021-02-21 16:04:20,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664479635] [2021-02-21 16:04:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-21 16:04:20,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664479635] [2021-02-21 16:04:20,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346675806] [2021-02-21 16:04:20,907 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 [2021-02-21 16:04:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-21 16:04:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-21 16:04:20,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:20,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:20,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:04:21,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:04:21,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:04:21,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:04:21,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:04:21,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:04:21,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:21,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:04:21,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,155 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-21 16:04:21,156 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-21 16:04:21,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-21 16:04:21,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-21 16:04:21,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-02-21 16:04:21,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322390957] [2021-02-21 16:04:21,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 16:04:21,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:21,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 16:04:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:04:21,162 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 10 states. [2021-02-21 16:04:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:21,404 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-02-21 16:04:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 16:04:21,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2021-02-21 16:04:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:21,406 INFO L225 Difference]: With dead ends: 28 [2021-02-21 16:04:21,406 INFO L226 Difference]: Without dead ends: 24 [2021-02-21 16:04:21,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-02-21 16:04:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-02-21 16:04:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-02-21 16:04:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-02-21 16:04:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-02-21 16:04:21,414 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-02-21 16:04:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:21,414 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-02-21 16:04:21,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 16:04:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-02-21 16:04:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:04:21,415 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:21,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:04:21,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-21 16:04:21,631 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1614351959, now seen corresponding path program 1 times [2021-02-21 16:04:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:21,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880418800] [2021-02-21 16:04:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:21,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:21,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:21,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:21,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:21,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:21,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:21,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-21 16:04:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880418800] [2021-02-21 16:04:21,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:21,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:04:21,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504909426] [2021-02-21 16:04:21,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:04:21,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:04:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:04:21,744 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2021-02-21 16:04:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:21,903 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-02-21 16:04:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:04:21,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-02-21 16:04:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:21,905 INFO L225 Difference]: With dead ends: 30 [2021-02-21 16:04:21,906 INFO L226 Difference]: Without dead ends: 26 [2021-02-21 16:04:21,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:04:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-02-21 16:04:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-02-21 16:04:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-02-21 16:04:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-02-21 16:04:21,922 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 28 [2021-02-21 16:04:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:21,923 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-02-21 16:04:21,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:04:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-02-21 16:04:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:04:21,924 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:21,925 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:04:21,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:04:21,925 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1585722808, now seen corresponding path program 2 times [2021-02-21 16:04:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:21,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190127734] [2021-02-21 16:04:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:04:21,968 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:04:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:04:22,015 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:04:22,049 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:04:22,050 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:04:22,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:04:22,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:04:22 BoogieIcfgContainer [2021-02-21 16:04:22,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:04:22,107 INFO L168 Benchmark]: Toolchain (without parser) took 3545.87 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 142.0 MB in the beginning and 154.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:22,107 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:04:22,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.13 ms. Allocated memory is still 159.4 MB. Free memory was 140.7 MB in the beginning and 131.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:22,108 INFO L168 Benchmark]: Boogie Preprocessor took 30.03 ms. Allocated memory is still 159.4 MB. Free memory was 131.7 MB in the beginning and 130.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:22,109 INFO L168 Benchmark]: RCFGBuilder took 380.12 ms. Allocated memory is still 159.4 MB. Free memory was 130.3 MB in the beginning and 130.5 MB in the end (delta: -198.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:22,109 INFO L168 Benchmark]: TraceAbstraction took 2880.60 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 129.9 MB in the beginning and 154.0 MB in the end (delta: -24.1 MB). Peak memory consumption was 9.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:22,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.13 ms. Allocated memory is still 159.4 MB. Free memory was 140.7 MB in the beginning and 131.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.03 ms. Allocated memory is still 159.4 MB. Free memory was 131.7 MB in the beginning and 130.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 380.12 ms. Allocated memory is still 159.4 MB. Free memory was 130.3 MB in the beginning and 130.5 MB in the end (delta: -198.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2880.60 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 129.9 MB in the beginning and 154.0 MB in the end (delta: -24.1 MB). Peak memory consumption was 9.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L15] RET, EXPR id(input) VAL [id(input)=2, input=2] [L15] int result = id(input); [L16] COND TRUE result == 2 VAL [input=2, result=2] [L17] reach_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 61 SDslu, 105 SDs, 0 SdLazy, 255 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 5618 SizeOfPredicates, 1 NumberOfNonLiveVariables, 114 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...