/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:56:22,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:56:22,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:56:22,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:56:23,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:56:23,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:56:23,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:56:23,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:56:23,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:56:23,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:56:23,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:56:23,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:56:23,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:56:23,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:56:23,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:56:23,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:56:23,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:56:23,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:56:23,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:56:23,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:56:23,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:56:23,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:56:23,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:56:23,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:56:23,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:56:23,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:56:23,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:56:23,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:56:23,087 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:56:23,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:56:23,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:56:23,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:56:23,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:56:23,088 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:56:23,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:56:23,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:56:23,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:56:23,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:56:23,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:56:23,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:56:23,091 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:56:23,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:56:23,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:56:23,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:56:23,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:56:23,635 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:56:23,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2021-02-23 22:56:23,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1e1bea2/fab69c92402b4afd8e81cf2be4b44730/FLAG2732f5dd1 [2021-02-23 22:56:24,540 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:56:24,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2021-02-23 22:56:24,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1e1bea2/fab69c92402b4afd8e81cf2be4b44730/FLAG2732f5dd1 [2021-02-23 22:56:24,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1e1bea2/fab69c92402b4afd8e81cf2be4b44730 [2021-02-23 22:56:24,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:56:24,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:56:24,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:56:24,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:56:24,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:56:24,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:56:24" (1/1) ... [2021-02-23 22:56:24,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ac54dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:24, skipping insertion in model container [2021-02-23 22:56:24,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:56:24" (1/1) ... [2021-02-23 22:56:24,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:56:24,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:56:25,120 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_b2_o3.c[568,581] [2021-02-23 22:56:25,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:56:25,142 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:56:25,163 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_b2_o3.c[568,581] [2021-02-23 22:56:25,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:56:25,189 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:56:25,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25 WrapperNode [2021-02-23 22:56:25,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:56:25,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:56:25,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:56:25,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:56:25,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (1/1) ... [2021-02-23 22:56:25,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (1/1) ... [2021-02-23 22:56:25,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (1/1) ... [2021-02-23 22:56:25,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (1/1) ... [2021-02-23 22:56:25,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (1/1) ... [2021-02-23 22:56:25,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (1/1) ... [2021-02-23 22:56:25,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (1/1) ... [2021-02-23 22:56:25,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:56:25,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:56:25,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:56:25,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:56:25,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (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 [2021-02-23 22:56:25,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:56:25,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:56:25,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:56:25,376 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-23 22:56:25,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:56:25,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 22:56:25,377 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:56:25,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:56:25,378 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:56:25,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:56:25,379 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-23 22:56:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:56:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:56:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:56:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:56:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:56:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:56:25,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:56:25,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:56:25,793 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 22:56:25,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:56:25 BoogieIcfgContainer [2021-02-23 22:56:25,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:56:25,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:56:25,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:56:25,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:56:25,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:56:24" (1/3) ... [2021-02-23 22:56:25,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79efc9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:56:25, skipping insertion in model container [2021-02-23 22:56:25,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:56:25" (2/3) ... [2021-02-23 22:56:25,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79efc9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:56:25, skipping insertion in model container [2021-02-23 22:56:25,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:56:25" (3/3) ... [2021-02-23 22:56:25,821 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2021-02-23 22:56:25,837 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:56:25,848 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:56:25,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:56:25,949 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:56:25,949 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:56:25,949 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:56:25,950 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:56:25,950 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:56:25,953 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:56:25,954 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:56:25,954 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:56:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-23 22:56:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 22:56:26,044 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:56:26,045 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] [2021-02-23 22:56:26,049 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:56:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:56:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1616677185, now seen corresponding path program 1 times [2021-02-23 22:56:26,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:56:26,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830523863] [2021-02-23 22:56:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:56:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:26,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:26,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:26,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:26,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:56:26,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:26,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:56:26,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:26,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:26,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:56:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:26,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:26,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:26,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:56:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:26,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:26,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:26,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:26,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:56:26,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830523863] [2021-02-23 22:56:26,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:56:26,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 22:56:26,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649427279] [2021-02-23 22:56:26,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:56:26,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:56:26,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:56:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:56:26,790 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2021-02-23 22:56:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:56:27,189 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-23 22:56:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 22:56:27,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-23 22:56:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:56:27,206 INFO L225 Difference]: With dead ends: 49 [2021-02-23 22:56:27,207 INFO L226 Difference]: Without dead ends: 33 [2021-02-23 22:56:27,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:56:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-23 22:56:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-23 22:56:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-23 22:56:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-02-23 22:56:27,293 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 24 [2021-02-23 22:56:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:56:27,294 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-02-23 22:56:27,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:56:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-02-23 22:56:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-23 22:56:27,298 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:56:27,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:56:27,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:56:27,299 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:56:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:56:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2119372388, now seen corresponding path program 1 times [2021-02-23 22:56:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:56:27,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752997168] [2021-02-23 22:56:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:56:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:27,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:27,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:27,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:56:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:27,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:27,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:56:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:27,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:27,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:27,619 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 22:56:27,622 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 22:56:27,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:27,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:27,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:27,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:27,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 22:56:27,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752997168] [2021-02-23 22:56:27,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:56:27,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 22:56:27,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141803743] [2021-02-23 22:56:27,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:56:27,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:56:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:56:27,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:56:27,718 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2021-02-23 22:56:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:56:28,076 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-02-23 22:56:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 22:56:28,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-02-23 22:56:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:56:28,090 INFO L225 Difference]: With dead ends: 51 [2021-02-23 22:56:28,090 INFO L226 Difference]: Without dead ends: 39 [2021-02-23 22:56:28,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:56:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-23 22:56:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-02-23 22:56:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-23 22:56:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-02-23 22:56:28,129 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-02-23 22:56:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:56:28,130 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-02-23 22:56:28,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:56:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-02-23 22:56:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-23 22:56:28,133 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:56:28,134 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:56:28,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:56:28,135 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:56:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:56:28,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1209934172, now seen corresponding path program 1 times [2021-02-23 22:56:28,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:56:28,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550896183] [2021-02-23 22:56:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:56:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:28,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:28,194 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 22:56:28,196 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 22:56:28,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:56:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:28,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:56:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:28,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:28,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:28,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:28,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:28,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 22:56:28,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550896183] [2021-02-23 22:56:28,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:56:28,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-23 22:56:28,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048401703] [2021-02-23 22:56:28,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:56:28,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:56:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:56:28,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:56:28,358 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2021-02-23 22:56:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:56:28,811 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-02-23 22:56:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:56:28,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-02-23 22:56:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:56:28,813 INFO L225 Difference]: With dead ends: 44 [2021-02-23 22:56:28,814 INFO L226 Difference]: Without dead ends: 39 [2021-02-23 22:56:28,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:56:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-23 22:56:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-02-23 22:56:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-23 22:56:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-23 22:56:28,829 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2021-02-23 22:56:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:56:28,829 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-23 22:56:28,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:56:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-23 22:56:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 22:56:28,831 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:56:28,832 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:56:28,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 22:56:28,832 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:56:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:56:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2045487603, now seen corresponding path program 1 times [2021-02-23 22:56:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:56:28,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169495366] [2021-02-23 22:56:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:56:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:28,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:56:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:28,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:28,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:28,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:56:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,069 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 22:56:29,071 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 22:56:29,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 22:56:29,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169495366] [2021-02-23 22:56:29,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:56:29,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-23 22:56:29,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239102886] [2021-02-23 22:56:29,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:56:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:56:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:56:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:56:29,188 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 9 states. [2021-02-23 22:56:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:56:29,704 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-02-23 22:56:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:56:29,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-23 22:56:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:56:29,707 INFO L225 Difference]: With dead ends: 57 [2021-02-23 22:56:29,707 INFO L226 Difference]: Without dead ends: 45 [2021-02-23 22:56:29,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:56:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-23 22:56:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-02-23 22:56:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-23 22:56:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-02-23 22:56:29,725 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 42 [2021-02-23 22:56:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:56:29,725 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-02-23 22:56:29,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:56:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-02-23 22:56:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 22:56:29,727 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:56:29,728 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-02-23 22:56:29,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 22:56:29,728 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:56:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:56:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1283818957, now seen corresponding path program 2 times [2021-02-23 22:56:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:56:29,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026011025] [2021-02-23 22:56:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:56:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,782 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 22:56:29,783 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 22:56:29,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:56:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:56:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:29,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:29,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:29,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:29,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 22:56:30,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026011025] [2021-02-23 22:56:30,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:56:30,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:56:30,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968532966] [2021-02-23 22:56:30,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:56:30,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:56:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:56:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:56:30,013 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2021-02-23 22:56:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:56:30,808 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-02-23 22:56:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 22:56:30,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2021-02-23 22:56:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:56:30,810 INFO L225 Difference]: With dead ends: 52 [2021-02-23 22:56:30,811 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 22:56:30,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-23 22:56:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 22:56:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-23 22:56:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 22:56:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-23 22:56:30,828 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-02-23 22:56:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:56:30,829 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-23 22:56:30,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:56:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-23 22:56:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 22:56:30,831 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:56:30,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1] [2021-02-23 22:56:30,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 22:56:30,832 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:56:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:56:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash -273173928, now seen corresponding path program 3 times [2021-02-23 22:56:30,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:56:30,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335252011] [2021-02-23 22:56:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:56:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:30,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:30,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:30,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:30,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:30,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:56:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:30,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:30,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:30,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:56:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:30,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:30,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:30,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:30,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:30,967 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 22:56:30,971 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 22:56:30,998 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 22:56:30,999 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 22:56:31,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:31,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:31,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:31,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:31,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:31,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:31,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:31,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:31,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:31,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:31,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:31,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 22:56:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:56:31,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:56:31,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:56:31,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:56:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-02-23 22:56:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335252011] [2021-02-23 22:56:31,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:56:31,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:56:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872973948] [2021-02-23 22:56:31,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:56:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:56:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:56:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:56:31,232 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 12 states. [2021-02-23 22:56:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:56:32,067 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-02-23 22:56:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 22:56:32,068 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2021-02-23 22:56:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:56:32,069 INFO L225 Difference]: With dead ends: 53 [2021-02-23 22:56:32,069 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 22:56:32,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-02-23 22:56:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 22:56:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 22:56:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 22:56:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 22:56:32,072 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-02-23 22:56:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:56:32,072 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 22:56:32,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:56:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 22:56:32,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 22:56:32,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 22:56:32,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 22:56:32,776 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-23 22:56:32,947 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-23 22:56:33,083 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-02-23 22:56:33,435 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-02-23 22:56:33,444 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-23 22:56:33,445 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-23 22:56:33,445 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-23 22:56:33,445 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-23 22:56:33,445 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-23 22:56:33,445 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:56:33,445 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 22:56:33,446 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2021-02-23 22:56:33,446 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 22:56:33,446 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-23 22:56:33,446 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-23 22:56:33,446 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-23 22:56:33,446 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:56:33,447 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:56:33,447 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:56:33,447 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 22:56:33,447 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 22:56:33,447 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: false [2021-02-23 22:56:33,447 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2021-02-23 22:56:33,448 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2021-02-23 22:56:33,448 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: false [2021-02-23 22:56:33,448 INFO L185 CegarLoopUtils]: At program point L16(lines 16 18) the Hoare annotation is: (and (<= main_~result~0 2) (< 0 (+ (div main_~result~0 4294967296) 1))) [2021-02-23 22:56:33,448 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: false [2021-02-23 22:56:33,448 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-23 22:56:33,448 INFO L192 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: true [2021-02-23 22:56:33,449 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (or (and (<= 1 |main_#t~ret9|) (<= |main_#t~ret9| 1)) (and (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|)) (= |main_#t~ret9| 0)) [2021-02-23 22:56:33,449 INFO L192 CegarLoopUtils]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2021-02-23 22:56:33,449 INFO L185 CegarLoopUtils]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= 1 |main_#t~ret9|) (<= main_~result~0 1) (<= |main_#t~ret9| 1) .cse0) (and (= main_~result~0 0) (= |main_#t~ret9| 0)) (and (<= main_~result~0 2) (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|) .cse0))) [2021-02-23 22:56:33,449 INFO L185 CegarLoopUtils]: At program point idFINAL(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2021-02-23 22:56:33,450 INFO L185 CegarLoopUtils]: At program point idEXIT(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2021-02-23 22:56:33,450 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-02-23 22:56:33,450 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2021-02-23 22:56:33,450 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2021-02-23 22:56:33,450 INFO L192 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-02-23 22:56:33,451 INFO L185 CegarLoopUtils]: At program point L9-1(line 9) the Hoare annotation is: (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) [2021-02-23 22:56:33,451 INFO L192 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: true [2021-02-23 22:56:33,451 INFO L185 CegarLoopUtils]: At program point L8-1(line 8) the Hoare annotation is: (or (and (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|)) (and (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= 0 |id_#t~ret7|) (<= |id_#t~ret7| 0))) [2021-02-23 22:56:33,451 INFO L192 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: true [2021-02-23 22:56:33,451 INFO L185 CegarLoopUtils]: At program point L8-2(line 8) the Hoare annotation is: (or (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= id_~ret~0 2) (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|) (<= 2 id_~ret~0)) (and (<= 0 |id_#t~ret7|) (<= id_~ret~0 1) (<= |id_#t~ret7| 0) (<= 1 id_~ret~0))) [2021-02-23 22:56:33,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:56:33 BoogieIcfgContainer [2021-02-23 22:56:33,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:56:33,475 INFO L168 Benchmark]: Toolchain (without parser) took 8592.62 ms. Allocated memory was 169.9 MB in the beginning and 292.6 MB in the end (delta: 122.7 MB). Free memory was 147.0 MB in the beginning and 248.6 MB in the end (delta: -101.5 MB). Peak memory consumption was 165.8 MB. Max. memory is 8.0 GB. [2021-02-23 22:56:33,475 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 169.9 MB. Free memory is still 143.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:56:33,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.66 ms. Allocated memory is still 169.9 MB. Free memory was 146.0 MB in the beginning and 136.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:56:33,477 INFO L168 Benchmark]: Boogie Preprocessor took 41.57 ms. Allocated memory is still 169.9 MB. Free memory was 136.7 MB in the beginning and 135.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:56:33,477 INFO L168 Benchmark]: RCFGBuilder took 566.78 ms. Allocated memory is still 169.9 MB. Free memory was 135.3 MB in the beginning and 121.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:56:33,478 INFO L168 Benchmark]: TraceAbstraction took 7666.48 ms. Allocated memory was 169.9 MB in the beginning and 292.6 MB in the end (delta: 122.7 MB). Free memory was 120.8 MB in the beginning and 248.6 MB in the end (delta: -127.7 MB). Peak memory consumption was 139.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:56:33,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 169.9 MB. Free memory is still 143.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.66 ms. Allocated memory is still 169.9 MB. Free memory was 146.0 MB in the beginning and 136.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.57 ms. Allocated memory is still 169.9 MB. Free memory was 136.7 MB in the beginning and 135.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 566.78 ms. Allocated memory is still 169.9 MB. Free memory was 135.3 MB in the beginning and 121.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7666.48 ms. Allocated memory was 169.9 MB in the beginning and 292.6 MB in the end (delta: 122.7 MB). Free memory was 120.8 MB in the beginning and 248.6 MB in the end (delta: -127.7 MB). Peak memory consumption was 139.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id: ((((ret <= 2 && 2 <= ret) || (3 <= ret && ret / 4294967296 <= 0)) || (((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret)) || (0 <= \result && \result <= 0)) && (((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (0 <= \result && \result <= 0)) || (2 <= \result && \result <= 2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 178 SDtfs, 191 SDslu, 515 SDs, 0 SdLazy, 871 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 47 PreInvPairs, 107 NumberOfFragments, 371 HoareAnnotationTreeSize, 47 FomulaSimplifications, 6276 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 36 FomulaSimplificationsInter, 1398 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 225 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 219 ConstructedInterpolants, 0 QuantifiedInterpolants, 31851 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 47/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...