/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:17:21,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:17:21,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:17:21,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:17:21,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:17:21,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:17:21,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:17:21,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:17:21,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:17:21,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:17:21,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:17:21,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:17:21,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:17:21,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:17:21,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:17:21,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:17:21,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:17:21,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:17:21,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:17:21,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:17:21,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:17:21,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:17:21,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:17:21,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:17:21,228 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:17:21,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:17:21,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:17:21,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:17:21,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:17:21,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:17:21,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:17:21,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:17:21,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:17:21,231 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:17:21,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:17:21,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:17:21,232 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:17:21,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:17:21,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:17:21,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:17:21,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:17:21,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:17:21,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:17:21,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:17:21,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:17:21,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:17:21,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:17:21,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:17:21,698 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:17:21,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2021-02-21 21:17:21,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802267890/463135d6dfe2446c92dd7ee2c0d61700/FLAGc58bb4789 [2021-02-21 21:17:22,478 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:17:22,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2021-02-21 21:17:22,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802267890/463135d6dfe2446c92dd7ee2c0d61700/FLAGc58bb4789 [2021-02-21 21:17:22,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802267890/463135d6dfe2446c92dd7ee2c0d61700 [2021-02-21 21:17:22,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:17:22,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:17:22,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:22,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:17:22,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:17:22,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:22" (1/1) ... [2021-02-21 21:17:22,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e78cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:22, skipping insertion in model container [2021-02-21 21:17:22,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:22" (1/1) ... [2021-02-21 21:17:22,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:17:22,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:17:23,097 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2021-02-21 21:17:23,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:23,139 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:17:23,152 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2021-02-21 21:17:23,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:23,178 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:17:23,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23 WrapperNode [2021-02-21 21:17:23,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:23,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:17:23,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:17:23,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:17:23,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (1/1) ... [2021-02-21 21:17:23,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (1/1) ... [2021-02-21 21:17:23,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (1/1) ... [2021-02-21 21:17:23,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (1/1) ... [2021-02-21 21:17:23,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (1/1) ... [2021-02-21 21:17:23,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (1/1) ... [2021-02-21 21:17:23,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (1/1) ... [2021-02-21 21:17:23,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:17:23,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:17:23,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:17:23,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:17:23,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (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 21:17:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:17:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:17:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:17:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:17:23,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:17:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:17:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:17:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:17:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:17:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:17:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 21:17:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 21:17:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:17:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:17:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:17:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:17:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:17:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:17:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:17:23,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:17:23,813 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-21 21:17:23,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:23 BoogieIcfgContainer [2021-02-21 21:17:23,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:17:23,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:17:23,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:17:23,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:17:23,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:22" (1/3) ... [2021-02-21 21:17:23,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab23584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:23, skipping insertion in model container [2021-02-21 21:17:23,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:23" (2/3) ... [2021-02-21 21:17:23,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab23584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:23, skipping insertion in model container [2021-02-21 21:17:23,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:23" (3/3) ... [2021-02-21 21:17:23,825 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2021-02-21 21:17:23,833 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:17:23,838 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:17:23,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:17:23,887 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:17:23,887 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:17:23,888 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:17:23,888 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:17:23,888 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:17:23,889 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:17:23,889 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:17:23,889 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:17:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2021-02-21 21:17:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:17:23,932 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:23,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:23,933 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash 56541078, now seen corresponding path program 1 times [2021-02-21 21:17:23,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:23,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237159131] [2021-02-21 21:17:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:24,032 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:24,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:24,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:24,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:24,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:24,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:24,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:24,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:24,394 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 21:17:24,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237159131] [2021-02-21 21:17:24,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:24,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:17:24,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112156772] [2021-02-21 21:17:24,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:17:24,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:24,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:17:24,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:17:24,427 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2021-02-21 21:17:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:24,767 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-02-21 21:17:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:17:24,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-21 21:17:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:24,779 INFO L225 Difference]: With dead ends: 127 [2021-02-21 21:17:24,780 INFO L226 Difference]: Without dead ends: 62 [2021-02-21 21:17:24,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:17:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-21 21:17:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-21 21:17:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-21 21:17:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-02-21 21:17:24,869 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 36 [2021-02-21 21:17:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:24,870 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-02-21 21:17:24,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:17:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-02-21 21:17:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:17:24,872 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:24,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:24,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:17:24,873 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash -221059569, now seen corresponding path program 1 times [2021-02-21 21:17:24,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:24,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018426774] [2021-02-21 21:17:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:24,885 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:24,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:24,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:24,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:24,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:24,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:24,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:24,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:24,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:25,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:25,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:25,068 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 21:17:25,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018426774] [2021-02-21 21:17:25,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:25,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:17:25,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318464856] [2021-02-21 21:17:25,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:17:25,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:17:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:17:25,071 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 5 states. [2021-02-21 21:17:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:25,396 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-02-21 21:17:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:17:25,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-21 21:17:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:25,400 INFO L225 Difference]: With dead ends: 112 [2021-02-21 21:17:25,400 INFO L226 Difference]: Without dead ends: 79 [2021-02-21 21:17:25,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:17:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-21 21:17:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-02-21 21:17:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 21:17:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-02-21 21:17:25,419 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 36 [2021-02-21 21:17:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:25,420 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-02-21 21:17:25,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:17:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-02-21 21:17:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 21:17:25,421 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:25,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:25,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:17:25,422 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1628001064, now seen corresponding path program 1 times [2021-02-21 21:17:25,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:25,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182816785] [2021-02-21 21:17:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:25,451 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:25,453 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:25,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:25,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:25,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:25,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:25,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:25,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:25,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:25,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:25,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:25,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:25,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:25,595 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 21:17:25,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182816785] [2021-02-21 21:17:25,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:25,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:17:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293700603] [2021-02-21 21:17:25,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:17:25,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:17:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:17:25,599 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 5 states. [2021-02-21 21:17:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:25,929 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-02-21 21:17:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:17:25,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-02-21 21:17:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:25,932 INFO L225 Difference]: With dead ends: 100 [2021-02-21 21:17:25,932 INFO L226 Difference]: Without dead ends: 80 [2021-02-21 21:17:25,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:17:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-21 21:17:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2021-02-21 21:17:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-21 21:17:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-02-21 21:17:25,946 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2021-02-21 21:17:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:25,947 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-02-21 21:17:25,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:17:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-02-21 21:17:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-21 21:17:25,949 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:25,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-02-21 21:17:25,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:17:25,950 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash -398128882, now seen corresponding path program 1 times [2021-02-21 21:17:25,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:25,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976707712] [2021-02-21 21:17:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:25,966 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:25,968 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:26,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:26,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:26,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 21:17:26,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:17:26,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:26,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:26,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:26,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:26,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:26,391 WARN L141 QuantifierPusher]: treesize reduction 28, result has 41.7 percent of original size [2021-02-21 21:17:26,393 WARN L147 QuantifierPusher]: treesize reduction 28, result has 41.7 percent of original size 20 [2021-02-21 21:17:26,433 WARN L141 QuantifierPusher]: treesize reduction 20, result has 72.2 percent of original size [2021-02-21 21:17:26,435 WARN L147 QuantifierPusher]: treesize reduction 20, result has 72.2 percent of original size 52 [2021-02-21 21:17:26,513 WARN L141 QuantifierPusher]: treesize reduction 21, result has 65.6 percent of original size [2021-02-21 21:17:26,514 WARN L147 QuantifierPusher]: treesize reduction 21, result has 65.6 percent of original size 40 [2021-02-21 21:17:26,588 WARN L141 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-02-21 21:17:26,590 WARN L147 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size 28 [2021-02-21 21:17:26,636 WARN L141 QuantifierPusher]: treesize reduction 25, result has 69.5 percent of original size [2021-02-21 21:17:26,638 WARN L147 QuantifierPusher]: treesize reduction 25, result has 69.5 percent of original size 57 [2021-02-21 21:17:26,704 WARN L141 QuantifierPusher]: treesize reduction 44, result has 60.7 percent of original size [2021-02-21 21:17:26,709 WARN L147 QuantifierPusher]: treesize reduction 44, result has 60.7 percent of original size 68 [2021-02-21 21:17:26,780 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size [2021-02-21 21:17:26,783 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size 46 [2021-02-21 21:17:26,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:26,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:26,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:26,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:26,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:26,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:26,994 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 21:17:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976707712] [2021-02-21 21:17:26,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:26,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-21 21:17:26,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527126802] [2021-02-21 21:17:26,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-21 21:17:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-21 21:17:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:17:27,000 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2021-02-21 21:17:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:28,403 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-02-21 21:17:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-21 21:17:28,404 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2021-02-21 21:17:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:28,406 INFO L225 Difference]: With dead ends: 169 [2021-02-21 21:17:28,406 INFO L226 Difference]: Without dead ends: 167 [2021-02-21 21:17:28,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-02-21 21:17:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-21 21:17:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 95. [2021-02-21 21:17:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-02-21 21:17:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-02-21 21:17:28,433 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 53 [2021-02-21 21:17:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:28,433 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-02-21 21:17:28,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-21 21:17:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-02-21 21:17:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-21 21:17:28,435 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:28,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-02-21 21:17:28,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:17:28,436 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:28,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1012224277, now seen corresponding path program 2 times [2021-02-21 21:17:28,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:28,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539034916] [2021-02-21 21:17:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:28,444 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:28,446 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:28,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:28,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:28,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:28,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:28,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:28,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:28,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:28,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:28,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:28,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:28,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:28,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:28,610 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 21:17:28,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539034916] [2021-02-21 21:17:28,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:28,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:17:28,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167732144] [2021-02-21 21:17:28,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:17:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:17:28,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:17:28,613 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 9 states. [2021-02-21 21:17:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:29,052 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2021-02-21 21:17:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-21 21:17:29,053 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2021-02-21 21:17:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:29,056 INFO L225 Difference]: With dead ends: 176 [2021-02-21 21:17:29,056 INFO L226 Difference]: Without dead ends: 156 [2021-02-21 21:17:29,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:17:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-21 21:17:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 105. [2021-02-21 21:17:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-02-21 21:17:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-02-21 21:17:29,095 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 60 [2021-02-21 21:17:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:29,099 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-02-21 21:17:29,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:17:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-02-21 21:17:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-21 21:17:29,102 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:29,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:29,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:17:29,103 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1503336308, now seen corresponding path program 3 times [2021-02-21 21:17:29,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:29,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233917970] [2021-02-21 21:17:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:29,114 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:29,116 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:29,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:29,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:17:29,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:29,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:29,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:29,260 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 21:17:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233917970] [2021-02-21 21:17:29,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:29,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:17:29,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054976415] [2021-02-21 21:17:29,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:17:29,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:29,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:17:29,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:17:29,264 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 10 states. [2021-02-21 21:17:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:29,620 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2021-02-21 21:17:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:17:29,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2021-02-21 21:17:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:29,622 INFO L225 Difference]: With dead ends: 170 [2021-02-21 21:17:29,622 INFO L226 Difference]: Without dead ends: 140 [2021-02-21 21:17:29,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:17:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-02-21 21:17:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2021-02-21 21:17:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-02-21 21:17:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-02-21 21:17:29,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 63 [2021-02-21 21:17:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:29,653 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-02-21 21:17:29,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:17:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-02-21 21:17:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-21 21:17:29,655 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:29,655 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2021-02-21 21:17:29,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:17:29,656 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 600609810, now seen corresponding path program 1 times [2021-02-21 21:17:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:29,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466179431] [2021-02-21 21:17:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:29,661 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:29,662 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:29,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:29,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:29,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:29,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:29,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:29,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:29,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:29,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-02-21 21:17:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:29,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:29,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:29,807 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 21:17:29,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466179431] [2021-02-21 21:17:29,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:29,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:17:29,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255208484] [2021-02-21 21:17:29,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:17:29,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:29,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:17:29,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:17:29,809 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 10 states. [2021-02-21 21:17:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:30,163 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2021-02-21 21:17:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-21 21:17:30,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2021-02-21 21:17:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:30,167 INFO L225 Difference]: With dead ends: 148 [2021-02-21 21:17:30,167 INFO L226 Difference]: Without dead ends: 97 [2021-02-21 21:17:30,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:17:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-21 21:17:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2021-02-21 21:17:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-21 21:17:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-02-21 21:17:30,188 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 69 [2021-02-21 21:17:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:30,188 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-02-21 21:17:30,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:17:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-02-21 21:17:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-21 21:17:30,192 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:30,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:30,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:17:30,193 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:30,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1043481275, now seen corresponding path program 4 times [2021-02-21 21:17:30,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:30,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272793051] [2021-02-21 21:17:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:30,206 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:30,207 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:30,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:30,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:17:30,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:17:30,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:17:30,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:17:30,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:30,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:30,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:30,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:30,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:30,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-21 21:17:30,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-21 21:17:30,493 WARN L141 QuantifierPusher]: treesize reduction 26, result has 60.6 percent of original size [2021-02-21 21:17:30,495 WARN L147 QuantifierPusher]: treesize reduction 26, result has 60.6 percent of original size 40 [2021-02-21 21:17:30,547 WARN L141 QuantifierPusher]: treesize reduction 17, result has 76.7 percent of original size [2021-02-21 21:17:30,550 WARN L147 QuantifierPusher]: treesize reduction 17, result has 76.7 percent of original size 56 [2021-02-21 21:17:30,618 WARN L141 QuantifierPusher]: treesize reduction 17, result has 78.5 percent of original size [2021-02-21 21:17:30,620 WARN L147 QuantifierPusher]: treesize reduction 17, result has 78.5 percent of original size 62 [2021-02-21 21:17:30,693 WARN L141 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-02-21 21:17:30,694 WARN L147 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size 28 [2021-02-21 21:17:30,728 WARN L141 QuantifierPusher]: treesize reduction 25, result has 69.1 percent of original size [2021-02-21 21:17:30,730 WARN L147 QuantifierPusher]: treesize reduction 25, result has 69.1 percent of original size 56 [2021-02-21 21:17:30,805 WARN L141 QuantifierPusher]: treesize reduction 44, result has 60.4 percent of original size [2021-02-21 21:17:30,810 WARN L147 QuantifierPusher]: treesize reduction 44, result has 60.4 percent of original size 67 [2021-02-21 21:17:30,880 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-02-21 21:17:30,881 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size 45 [2021-02-21 21:17:30,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:30,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:30,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:30,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:31,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:31,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:31,058 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 21:17:31,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272793051] [2021-02-21 21:17:31,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:31,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-02-21 21:17:31,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12880677] [2021-02-21 21:17:31,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-21 21:17:31,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-21 21:17:31,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-02-21 21:17:31,060 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 24 states. [2021-02-21 21:17:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:33,018 INFO L93 Difference]: Finished difference Result 196 states and 205 transitions. [2021-02-21 21:17:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-21 21:17:33,019 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2021-02-21 21:17:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:33,021 INFO L225 Difference]: With dead ends: 196 [2021-02-21 21:17:33,021 INFO L226 Difference]: Without dead ends: 194 [2021-02-21 21:17:33,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-02-21 21:17:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-21 21:17:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 122. [2021-02-21 21:17:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-02-21 21:17:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-02-21 21:17:33,046 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 70 [2021-02-21 21:17:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:33,046 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-02-21 21:17:33,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-21 21:17:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-02-21 21:17:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-21 21:17:33,048 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:33,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:33,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:17:33,048 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -206034540, now seen corresponding path program 5 times [2021-02-21 21:17:33,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:33,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125458936] [2021-02-21 21:17:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:33,056 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:33,057 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:33,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:33,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:33,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:33,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:33,231 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 21:17:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125458936] [2021-02-21 21:17:33,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:33,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:17:33,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971938091] [2021-02-21 21:17:33,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:17:33,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:33,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:17:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:17:33,233 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 12 states. [2021-02-21 21:17:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:33,816 INFO L93 Difference]: Finished difference Result 198 states and 207 transitions. [2021-02-21 21:17:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 21:17:33,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2021-02-21 21:17:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:33,818 INFO L225 Difference]: With dead ends: 198 [2021-02-21 21:17:33,818 INFO L226 Difference]: Without dead ends: 178 [2021-02-21 21:17:33,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:17:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-21 21:17:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2021-02-21 21:17:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-02-21 21:17:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-02-21 21:17:33,843 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 77 [2021-02-21 21:17:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:33,844 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-02-21 21:17:33,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:17:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-02-21 21:17:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-21 21:17:33,845 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:33,845 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:33,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:17:33,846 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:33,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1973542113, now seen corresponding path program 6 times [2021-02-21 21:17:33,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:33,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385688603] [2021-02-21 21:17:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:33,854 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:33,855 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:33,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:33,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:33,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:17:33,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:33,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:33,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:34,006 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 21:17:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385688603] [2021-02-21 21:17:34,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:34,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 21:17:34,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195756588] [2021-02-21 21:17:34,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 21:17:34,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 21:17:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:17:34,009 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 13 states. [2021-02-21 21:17:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:34,475 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2021-02-21 21:17:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 21:17:34,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-21 21:17:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:34,478 INFO L225 Difference]: With dead ends: 197 [2021-02-21 21:17:34,478 INFO L226 Difference]: Without dead ends: 167 [2021-02-21 21:17:34,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-02-21 21:17:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-21 21:17:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2021-02-21 21:17:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-02-21 21:17:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2021-02-21 21:17:34,505 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 80 [2021-02-21 21:17:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:34,506 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2021-02-21 21:17:34,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 21:17:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2021-02-21 21:17:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-21 21:17:34,507 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:34,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:34,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:17:34,508 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1425200063, now seen corresponding path program 2 times [2021-02-21 21:17:34,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:34,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491968565] [2021-02-21 21:17:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:34,515 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:34,517 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:17:34,541 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:17:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:17:34,562 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:17:34,603 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:17:34,603 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:17:34,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 21:17:34,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:17:34 BoogieIcfgContainer [2021-02-21 21:17:34,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:17:34,624 INFO L168 Benchmark]: Toolchain (without parser) took 11808.76 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 129.2 MB in the beginning and 160.5 MB in the end (delta: -31.3 MB). Peak memory consumption was 80.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:34,624 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 152.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:17:34,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.32 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:34,625 INFO L168 Benchmark]: Boogie Preprocessor took 42.02 ms. Allocated memory is still 152.0 MB. Free memory was 118.2 MB in the beginning and 116.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:34,625 INFO L168 Benchmark]: RCFGBuilder took 591.85 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 128.3 MB in the end (delta: -11.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:34,626 INFO L168 Benchmark]: TraceAbstraction took 10805.87 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 127.8 MB in the beginning and 160.5 MB in the end (delta: -32.7 MB). Peak memory consumption was 79.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:34,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 152.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 344.32 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.02 ms. Allocated memory is still 152.0 MB. Free memory was 118.2 MB in the beginning and 116.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 591.85 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 128.3 MB in the end (delta: -11.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10805.87 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 127.8 MB in the beginning and 160.5 MB in the end (delta: -32.7 MB). Peak memory consumption was 79.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 [L35] COND TRUE i