/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 18:00:00,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:00:00,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:00:00,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:00:00,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:00:00,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:00:00,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:00:00,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:00:00,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:00:00,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:00:00,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:00:00,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:00:00,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:00:00,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:00:00,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:00:00,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:00:00,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:00:00,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:00:00,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:00:00,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:00:00,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:00:00,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:00:00,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:00:00,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:00:00,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:00:00,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:00:00,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:00:00,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:00:00,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 18:00:00,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:00:00,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:00:00,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:00:00,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:00:00,351 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:00:00,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:00:00,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:00:00,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:00:00,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:00:00,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:00:00,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:00:00,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:00:00,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:00:00,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:00:00,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:00:00,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:00:00,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:00:00,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:00:00,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:00:00,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:00:00,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:00:00,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:00:00,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:00:00,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:00:00,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:00:00,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:00:00,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:00:00,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:00:00,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:00:00,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:00:00,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:00:00,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:00:00,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:00:00,863 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:00:00,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-02-19 18:00:00,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b585493a8/da51cc2558e744fb93d7376e1c95cdcc/FLAGfa998e192 [2021-02-19 18:00:01,536 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:00:01,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-02-19 18:00:01,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b585493a8/da51cc2558e744fb93d7376e1c95cdcc/FLAGfa998e192 [2021-02-19 18:00:01,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b585493a8/da51cc2558e744fb93d7376e1c95cdcc [2021-02-19 18:00:01,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:00:01,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:00:01,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:00:01,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:00:01,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:00:01,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:00:01" (1/1) ... [2021-02-19 18:00:01,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f74385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:01, skipping insertion in model container [2021-02-19 18:00:01,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:00:01" (1/1) ... [2021-02-19 18:00:01,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:00:01,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:00:02,230 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-02-19 18:00:02,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:00:02,284 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:00:02,300 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-02-19 18:00:02,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:00:02,326 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:00:02,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02 WrapperNode [2021-02-19 18:00:02,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:00:02,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:00:02,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:00:02,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:00:02,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (1/1) ... [2021-02-19 18:00:02,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (1/1) ... [2021-02-19 18:00:02,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (1/1) ... [2021-02-19 18:00:02,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (1/1) ... [2021-02-19 18:00:02,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (1/1) ... [2021-02-19 18:00:02,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (1/1) ... [2021-02-19 18:00:02,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (1/1) ... [2021-02-19 18:00:02,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:00:02,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:00:02,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:00:02,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:00:02,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (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 [2021-02-19 18:00:02,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:00:02,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:00:02,487 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:00:02,488 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 18:00:02,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-19 18:00:02,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:00:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:00:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:00:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-19 18:00:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-19 18:00:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:00:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:00:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 18:00:02,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-19 18:00:02,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 18:00:02,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:00:02,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:00:02,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:00:02,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:00:02,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:00:02,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:00:02,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:00:03,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:00:03,066 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 18:00:03,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:00:03 BoogieIcfgContainer [2021-02-19 18:00:03,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:00:03,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:00:03,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:00:03,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:00:03,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:00:01" (1/3) ... [2021-02-19 18:00:03,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373391f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:00:03, skipping insertion in model container [2021-02-19 18:00:03,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:00:02" (2/3) ... [2021-02-19 18:00:03,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373391f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:00:03, skipping insertion in model container [2021-02-19 18:00:03,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:00:03" (3/3) ... [2021-02-19 18:00:03,082 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2021-02-19 18:00:03,090 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:00:03,097 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:00:03,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 18:00:03,168 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:00:03,169 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:00:03,170 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:00:03,170 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:00:03,170 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:00:03,170 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:00:03,171 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:00:03,171 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:00:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-02-19 18:00:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 18:00:03,207 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:03,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:00:03,208 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:03,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1772946259, now seen corresponding path program 1 times [2021-02-19 18:00:03,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:03,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134731832] [2021-02-19 18:00:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:03,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:03,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:03,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:03,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:03,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:03,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-19 18:00:03,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:03,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:03,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:03,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:03,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:03,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:03,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:03,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:03,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:00:03,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134731832] [2021-02-19 18:00:03,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:03,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:00:03,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767315606] [2021-02-19 18:00:03,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:00:03,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:03,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:00:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:00:03,784 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2021-02-19 18:00:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:04,307 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2021-02-19 18:00:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:00:04,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-19 18:00:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:04,323 INFO L225 Difference]: With dead ends: 88 [2021-02-19 18:00:04,323 INFO L226 Difference]: Without dead ends: 47 [2021-02-19 18:00:04,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:00:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-19 18:00:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-02-19 18:00:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-19 18:00:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-02-19 18:00:04,409 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2021-02-19 18:00:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:04,409 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-02-19 18:00:04,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:00:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-02-19 18:00:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 18:00:04,411 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:04,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:00:04,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:00:04,412 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1794902226, now seen corresponding path program 1 times [2021-02-19 18:00:04,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:04,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804315562] [2021-02-19 18:00:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:04,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:04,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:04,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:04,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:04,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:04,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:04,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:04,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:04,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:04,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:04,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:04,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:04,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:04,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:04,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:00:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804315562] [2021-02-19 18:00:04,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:04,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:00:04,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719033847] [2021-02-19 18:00:04,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:00:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:00:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:00:04,507 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand 6 states. [2021-02-19 18:00:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:04,873 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2021-02-19 18:00:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:00:04,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-19 18:00:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:04,880 INFO L225 Difference]: With dead ends: 55 [2021-02-19 18:00:04,880 INFO L226 Difference]: Without dead ends: 53 [2021-02-19 18:00:04,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:00:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-19 18:00:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-02-19 18:00:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-19 18:00:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-02-19 18:00:04,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2021-02-19 18:00:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:04,922 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-02-19 18:00:04,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:00:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-02-19 18:00:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:00:04,926 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:04,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:00:04,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:00:04,927 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1560251136, now seen corresponding path program 1 times [2021-02-19 18:00:04,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:04,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574772188] [2021-02-19 18:00:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:05,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,038 WARN L141 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-02-19 18:00:05,039 WARN L147 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size 3 [2021-02-19 18:00:05,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:05,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:05,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:05,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-19 18:00:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:05,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:00:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574772188] [2021-02-19 18:00:05,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:05,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:00:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534661704] [2021-02-19 18:00:05,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:00:05,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:00:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:00:05,140 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand 6 states. [2021-02-19 18:00:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:05,548 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-02-19 18:00:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:00:05,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-02-19 18:00:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:05,555 INFO L225 Difference]: With dead ends: 57 [2021-02-19 18:00:05,556 INFO L226 Difference]: Without dead ends: 55 [2021-02-19 18:00:05,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:00:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-19 18:00:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-02-19 18:00:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-19 18:00:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-02-19 18:00:05,576 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2021-02-19 18:00:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:05,576 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-02-19 18:00:05,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:00:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-02-19 18:00:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:00:05,578 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:05,578 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:00:05,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:00:05,578 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1084781042, now seen corresponding path program 1 times [2021-02-19 18:00:05,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:05,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637422525] [2021-02-19 18:00:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:05,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:05,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:05,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:05,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:05,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:05,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:05,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-19 18:00:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:05,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-19 18:00:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:05,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:05,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:00:05,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637422525] [2021-02-19 18:00:05,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:05,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-19 18:00:05,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21583956] [2021-02-19 18:00:05,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:00:05,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:05,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:00:05,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:00:05,709 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 7 states. [2021-02-19 18:00:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:06,131 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-02-19 18:00:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:00:06,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-02-19 18:00:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:06,134 INFO L225 Difference]: With dead ends: 61 [2021-02-19 18:00:06,134 INFO L226 Difference]: Without dead ends: 59 [2021-02-19 18:00:06,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:00:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-02-19 18:00:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-02-19 18:00:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-19 18:00:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-02-19 18:00:06,151 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2021-02-19 18:00:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:06,152 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-02-19 18:00:06,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-19 18:00:06,152 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-02-19 18:00:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:00:06,153 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:06,154 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:00:06,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:00:06,154 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1893905473, now seen corresponding path program 1 times [2021-02-19 18:00:06,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:06,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417839730] [2021-02-19 18:00:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,193 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-19 18:00:06,194 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-19 18:00:06,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:06,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:06,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-19 18:00:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-19 18:00:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-19 18:00:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-19 18:00:06,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417839730] [2021-02-19 18:00:06,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:06,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:00:06,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091011203] [2021-02-19 18:00:06,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:00:06,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:00:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:00:06,271 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 6 states. [2021-02-19 18:00:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:06,634 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-02-19 18:00:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:00:06,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-02-19 18:00:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:06,636 INFO L225 Difference]: With dead ends: 66 [2021-02-19 18:00:06,636 INFO L226 Difference]: Without dead ends: 64 [2021-02-19 18:00:06,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:00:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-19 18:00:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-19 18:00:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-19 18:00:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-02-19 18:00:06,654 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2021-02-19 18:00:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:06,654 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-02-19 18:00:06,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:00:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-02-19 18:00:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:00:06,656 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:06,657 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-02-19 18:00:06,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:00:06,657 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1991737873, now seen corresponding path program 1 times [2021-02-19 18:00:06,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:06,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062057464] [2021-02-19 18:00:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:06,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:06,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:06,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:06,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-19 18:00:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-19 18:00:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-19 18:00:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-19 18:00:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-19 18:00:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-19 18:00:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:06,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:06,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-02-19 18:00:06,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062057464] [2021-02-19 18:00:06,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:06,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-19 18:00:06,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143008287] [2021-02-19 18:00:06,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:00:06,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:00:06,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:00:06,806 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 7 states. [2021-02-19 18:00:07,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:07,245 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-02-19 18:00:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:00:07,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2021-02-19 18:00:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:07,247 INFO L225 Difference]: With dead ends: 75 [2021-02-19 18:00:07,247 INFO L226 Difference]: Without dead ends: 73 [2021-02-19 18:00:07,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:00:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-19 18:00:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-02-19 18:00:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-19 18:00:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-02-19 18:00:07,274 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2021-02-19 18:00:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-02-19 18:00:07,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-19 18:00:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-02-19 18:00:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-19 18:00:07,277 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:07,278 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-02-19 18:00:07,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:00:07,278 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:07,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1947441265, now seen corresponding path program 1 times [2021-02-19 18:00:07,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:07,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50925058] [2021-02-19 18:00:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:07,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:07,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:07,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:07,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:07,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-19 18:00:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-19 18:00:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-19 18:00:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-19 18:00:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-19 18:00:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-19 18:00:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-19 18:00:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-19 18:00:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:07,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-02-19 18:00:07,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50925058] [2021-02-19 18:00:07,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:07,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 18:00:07,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138683315] [2021-02-19 18:00:07,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:00:07,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:07,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:00:07,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:00:07,455 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 8 states. [2021-02-19 18:00:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:07,920 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-02-19 18:00:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:00:07,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2021-02-19 18:00:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:07,922 INFO L225 Difference]: With dead ends: 75 [2021-02-19 18:00:07,922 INFO L226 Difference]: Without dead ends: 73 [2021-02-19 18:00:07,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:00:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-19 18:00:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-02-19 18:00:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-19 18:00:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-02-19 18:00:07,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2021-02-19 18:00:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:07,938 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-02-19 18:00:07,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-19 18:00:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-02-19 18:00:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-02-19 18:00:07,940 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:00:07,940 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-02-19 18:00:07,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:00:07,940 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:00:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:00:07,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1358511123, now seen corresponding path program 1 times [2021-02-19 18:00:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:00:07,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228405063] [2021-02-19 18:00:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:00:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:07,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:08,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:08,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:08,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:00:08,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:08,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:00:08,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:00:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-19 18:00:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-19 18:00:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-19 18:00:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-19 18:00:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-19 18:00:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-19 18:00:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-19 18:00:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-19 18:00:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-19 18:00:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-19 18:00:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:00:08,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:00:08,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:00:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-02-19 18:00:08,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228405063] [2021-02-19 18:00:08,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:00:08,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-19 18:00:08,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372916421] [2021-02-19 18:00:08,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:00:08,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:00:08,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:00:08,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:00:08,156 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 9 states. [2021-02-19 18:00:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:00:08,654 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2021-02-19 18:00:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:00:08,655 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2021-02-19 18:00:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:00:08,657 INFO L225 Difference]: With dead ends: 73 [2021-02-19 18:00:08,657 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 18:00:08,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:00:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 18:00:08,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 18:00:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 18:00:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 18:00:08,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-02-19 18:00:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:00:08,666 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 18:00:08,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-19 18:00:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 18:00:08,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 18:00:08,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:00:08,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 18:00:09,600 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-19 18:00:09,600 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-19 18:00:09,600 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-19 18:00:09,600 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 18:00:09,601 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-19 18:00:09,601 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 18:00:09,601 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 18:00:09,601 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 18:00:09,602 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 18:00:09,602 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 18:00:09,602 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-19 18:00:09,602 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-19 18:00:09,602 INFO L189 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-02-19 18:00:09,602 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-19 18:00:09,602 INFO L185 CegarLoopUtils]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,603 INFO L189 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-02-19 18:00:09,603 INFO L189 CegarLoopUtils]: For program point L60(line 60) no Hoare annotation was computed. [2021-02-19 18:00:09,603 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 24 67) no Hoare annotation was computed. [2021-02-19 18:00:09,603 INFO L185 CegarLoopUtils]: At program point L56(lines 36 63) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,603 INFO L185 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,603 INFO L185 CegarLoopUtils]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,604 INFO L185 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,604 INFO L185 CegarLoopUtils]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,604 INFO L185 CegarLoopUtils]: At program point L40-1(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,604 INFO L189 CegarLoopUtils]: For program point L36(lines 36 63) no Hoare annotation was computed. [2021-02-19 18:00:09,604 INFO L185 CegarLoopUtils]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,604 INFO L189 CegarLoopUtils]: For program point L53(line 53) no Hoare annotation was computed. [2021-02-19 18:00:09,605 INFO L189 CegarLoopUtils]: For program point L49(line 49) no Hoare annotation was computed. [2021-02-19 18:00:09,605 INFO L185 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,605 INFO L185 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,605 INFO L185 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,605 INFO L185 CegarLoopUtils]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,606 INFO L185 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,606 INFO L185 CegarLoopUtils]: At program point L46-1(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,606 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 24 67) no Hoare annotation was computed. [2021-02-19 18:00:09,606 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,606 INFO L189 CegarLoopUtils]: For program point L38(line 38) no Hoare annotation was computed. [2021-02-19 18:00:09,606 INFO L185 CegarLoopUtils]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,606 INFO L189 CegarLoopUtils]: For program point L34-3(lines 34 65) no Hoare annotation was computed. [2021-02-19 18:00:09,607 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 67) the Hoare annotation is: true [2021-02-19 18:00:09,607 INFO L185 CegarLoopUtils]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,607 INFO L185 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-19 18:00:09,607 INFO L189 CegarLoopUtils]: For program point L43(line 43) no Hoare annotation was computed. [2021-02-19 18:00:09,607 INFO L189 CegarLoopUtils]: For program point L39(line 39) no Hoare annotation was computed. [2021-02-19 18:00:09,607 INFO L189 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-02-19 18:00:09,607 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-19 18:00:09,608 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-02-19 18:00:09,608 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-02-19 18:00:09,608 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-02-19 18:00:09,608 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-02-19 18:00:09,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:00:09 BoogieIcfgContainer [2021-02-19 18:00:09,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:00:09,628 INFO L168 Benchmark]: Toolchain (without parser) took 7703.92 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 130.9 MB in the beginning and 162.5 MB in the end (delta: -31.6 MB). Peak memory consumption was 123.1 MB. Max. memory is 8.0 GB. [2021-02-19 18:00:09,629 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 155.2 MB. Free memory was 129.3 MB in the beginning and 129.2 MB in the end (delta: 80.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 18:00:09,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.17 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 119.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 18:00:09,631 INFO L168 Benchmark]: Boogie Preprocessor took 45.68 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 118.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-19 18:00:09,631 INFO L168 Benchmark]: RCFGBuilder took 694.56 ms. Allocated memory is still 155.2 MB. Free memory was 118.0 MB in the beginning and 133.7 MB in the end (delta: -15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-19 18:00:09,632 INFO L168 Benchmark]: TraceAbstraction took 6553.14 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 133.1 MB in the beginning and 162.5 MB in the end (delta: -29.4 MB). Peak memory consumption was 125.3 MB. Max. memory is 8.0 GB. [2021-02-19 18:00:09,635 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 155.2 MB. Free memory was 129.3 MB in the beginning and 129.2 MB in the end (delta: 80.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 385.17 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 119.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.68 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 118.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 694.56 ms. Allocated memory is still 155.2 MB. Free memory was 118.0 MB in the beginning and 133.7 MB in the end (delta: -15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6553.14 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 133.1 MB in the beginning and 162.5 MB in the end (delta: -29.4 MB). Peak memory consumption was 125.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i < len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.5s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 286 SDtfs, 247 SDslu, 491 SDs, 0 SdLazy, 1162 SolverSat, 485 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 384 HoareAnnotationTreeSize, 55 FomulaSimplifications, 3224 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 23 FomulaSimplificationsInter, 697 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 30858 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...