/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:29:11,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:29:11,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:29:11,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:29:11,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:29:11,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:29:11,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:29:11,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:29:11,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:29:11,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:29:11,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:29:11,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:29:11,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:29:11,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:29:11,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:29:11,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:29:11,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:29:11,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:29:11,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:29:11,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:29:11,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:29:11,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:29:11,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:29:11,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:29:11,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:29:11,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:29:11,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:29:11,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:29:11,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:29:11,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:29:11,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:29:11,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:29:11,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:29:11,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:29:11,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:29:11,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:29:11,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:29:11,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:29:11,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:29:11,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:29:11,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:29:11,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:29:11,250 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:29:11,250 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:29:11,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:29:11,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:29:11,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:29:11,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:29:11,495 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:29:11,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2021-05-02 19:29:11,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969128785/ba90347a9efc43c4954904af0b2e54fb/FLAGe879c71bf [2021-05-02 19:29:11,922 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:29:11,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2021-05-02 19:29:11,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969128785/ba90347a9efc43c4954904af0b2e54fb/FLAGe879c71bf [2021-05-02 19:29:11,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969128785/ba90347a9efc43c4954904af0b2e54fb [2021-05-02 19:29:11,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:29:11,947 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:29:11,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:11,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:29:11,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:29:11,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:11" (1/1) ... [2021-05-02 19:29:11,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6b14f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:11, skipping insertion in model container [2021-05-02 19:29:11,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:11" (1/1) ... [2021-05-02 19:29:11,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:29:11,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:29:12,085 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c[520,533] [2021-05-02 19:29:12,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:12,100 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:29:12,108 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c[520,533] [2021-05-02 19:29:12,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:12,133 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:29:12,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12 WrapperNode [2021-05-02 19:29:12,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:12,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:29:12,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:29:12,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:29:12,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:29:12,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:29:12,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:29:12,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:29:12,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (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 [2021-05-02 19:29:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:29:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:29:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:29:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:29:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:29:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:29:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:29:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:29:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:29:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:29:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:29:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:29:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:29:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:29:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:29:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:29:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:29:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:29:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:29:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:29:12,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:29:12,513 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:29:12,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:12 BoogieIcfgContainer [2021-05-02 19:29:12,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:29:12,515 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:29:12,515 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:29:12,515 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:29:12,517 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:12" (1/1) ... [2021-05-02 19:29:12,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:12 BasicIcfg [2021-05-02 19:29:12,538 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:29:12,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:29:12,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:29:12,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:29:12,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:29:11" (1/4) ... [2021-05-02 19:29:12,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d173bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:12, skipping insertion in model container [2021-05-02 19:29:12,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:12" (2/4) ... [2021-05-02 19:29:12,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d173bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:12, skipping insertion in model container [2021-05-02 19:29:12,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:12" (3/4) ... [2021-05-02 19:29:12,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d173bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:12, skipping insertion in model container [2021-05-02 19:29:12,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:12" (4/4) ... [2021-05-02 19:29:12,543 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.cJordan [2021-05-02 19:29:12,547 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:29:12,550 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:29:12,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:29:12,586 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:29:12,586 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:29:12,587 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:29:12,587 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:29:12,587 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:29:12,587 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:29:12,587 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:29:12,587 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:29:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:29:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:29:12,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:12,610 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:12,611 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash 637070135, now seen corresponding path program 1 times [2021-05-02 19:29:12,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:12,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980515587] [2021-05-02 19:29:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:12,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:29:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:12,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:12,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980515587] [2021-05-02 19:29:12,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980515587] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:12,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:12,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:29:12,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205482363] [2021-05-02 19:29:12,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:29:12,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:12,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:29:12,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:12,799 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:12,894 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-05-02 19:29:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:29:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:29:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:12,900 INFO L225 Difference]: With dead ends: 25 [2021-05-02 19:29:12,901 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 19:29:12,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 19:29:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 19:29:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:29:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-05-02 19:29:12,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-05-02 19:29:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:12,925 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-05-02 19:29:12,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-05-02 19:29:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:29:12,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:12,926 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:12,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:29:12,926 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:12,927 INFO L82 PathProgramCache]: Analyzing trace with hash 638946968, now seen corresponding path program 1 times [2021-05-02 19:29:12,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:12,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721560628] [2021-05-02 19:29:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:13,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:29:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:13,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721560628] [2021-05-02 19:29:13,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721560628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:13,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:13,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:29:13,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885322053] [2021-05-02 19:29:13,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:29:13,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:13,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:29:13,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:13,085 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:13,364 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 19:29:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:29:13,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:29:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:13,366 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:29:13,366 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:29:13,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:29:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:29:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-05-02 19:29:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:29:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 19:29:13,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 11 [2021-05-02 19:29:13,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:13,382 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 19:29:13,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 19:29:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 19:29:13,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:13,383 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:13,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:29:13,384 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:13,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash -264870136, now seen corresponding path program 1 times [2021-05-02 19:29:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:13,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472569946] [2021-05-02 19:29:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:13,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:13,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670778902] [2021-05-02 19:29:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:13,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:29:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:13,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:13,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472569946] [2021-05-02 19:29:13,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:13,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670778902] [2021-05-02 19:29:13,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670778902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:13,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:13,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:29:13,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467948759] [2021-05-02 19:29:13,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:29:13,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:29:13,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:29:13,629 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:13,735 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-02 19:29:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:29:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-05-02 19:29:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:13,736 INFO L225 Difference]: With dead ends: 36 [2021-05-02 19:29:13,736 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 19:29:13,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:29:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 19:29:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 19:29:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:29:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-05-02 19:29:13,740 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 16 [2021-05-02 19:29:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:13,740 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-05-02 19:29:13,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-05-02 19:29:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:29:13,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:13,741 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:13,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:29:13,942 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 357492833, now seen corresponding path program 1 times [2021-05-02 19:29:13,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:13,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3975756] [2021-05-02 19:29:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:13,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:13,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345706465] [2021-05-02 19:29:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:13,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 19:29:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:29:14,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:14,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3975756] [2021-05-02 19:29:14,083 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:14,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345706465] [2021-05-02 19:29:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345706465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:14,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:14,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:29:14,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535252083] [2021-05-02 19:29:14,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:29:14,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:29:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:14,085 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:29:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:14,142 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 19:29:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 19:29:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:14,144 INFO L225 Difference]: With dead ends: 45 [2021-05-02 19:29:14,144 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 19:29:14,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:29:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 19:29:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 19:29:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:29:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-05-02 19:29:14,148 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 28 [2021-05-02 19:29:14,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:14,149 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-05-02 19:29:14,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:29:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-05-02 19:29:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 19:29:14,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:14,150 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:14,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:14,365 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash -756366625, now seen corresponding path program 2 times [2021-05-02 19:29:14,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:14,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417188238] [2021-05-02 19:29:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:14,373 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:14,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230998740] [2021-05-02 19:29:14,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:14,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:29:14,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:29:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 19:29:14,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:29:14,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:14,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417188238] [2021-05-02 19:29:14,563 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:14,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230998740] [2021-05-02 19:29:14,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230998740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:14,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:14,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:29:14,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025357512] [2021-05-02 19:29:14,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:29:14,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:29:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:29:14,565 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:29:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:14,759 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-05-02 19:29:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:29:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-02 19:29:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:14,760 INFO L225 Difference]: With dead ends: 49 [2021-05-02 19:29:14,760 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 19:29:14,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:29:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 19:29:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 19:29:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:29:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 19:29:14,764 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 33 [2021-05-02 19:29:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:14,764 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 19:29:14,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:29:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 19:29:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:29:14,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:14,765 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:14,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:14,985 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1834826168, now seen corresponding path program 3 times [2021-05-02 19:29:14,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:14,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034978808] [2021-05-02 19:29:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:14,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:14,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210459603] [2021-05-02 19:29:14,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:15,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:29:15,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:29:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 19:29:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 19:29:15,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:15,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034978808] [2021-05-02 19:29:15,163 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:15,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210459603] [2021-05-02 19:29:15,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210459603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:15,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:15,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:29:15,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925309291] [2021-05-02 19:29:15,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:29:15,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:29:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:29:15,164 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:29:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:15,243 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-05-02 19:29:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:29:15,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:29:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:15,244 INFO L225 Difference]: With dead ends: 58 [2021-05-02 19:29:15,244 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 19:29:15,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:29:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 19:29:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-05-02 19:29:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 32 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:29:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-05-02 19:29:15,248 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2021-05-02 19:29:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:15,249 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-05-02 19:29:15,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:29:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-05-02 19:29:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:29:15,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:15,250 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:15,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:15,466 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash 547139560, now seen corresponding path program 4 times [2021-05-02 19:29:15,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:15,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779026791] [2021-05-02 19:29:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:15,473 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:15,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546982381] [2021-05-02 19:29:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:15,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:29:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:29:15,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 19:29:15,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:15,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 19:29:15,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779026791] [2021-05-02 19:29:15,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546982381] [2021-05-02 19:29:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546982381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:15,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:29:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945737895] [2021-05-02 19:29:15,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:29:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:29:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:29:15,680 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:29:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:15,741 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-02 19:29:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:29:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 19:29:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:15,742 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:29:15,742 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:29:15,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:29:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:29:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:29:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:29:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:29:15,743 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-02 19:29:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:15,743 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:29:15,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:29:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:29:15,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:29:15,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:29:15,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:15 BasicIcfg [2021-05-02 19:29:15,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:29:15,947 INFO L168 Benchmark]: Toolchain (without parser) took 4000.57 ms. Allocated memory is still 196.1 MB. Free memory was 161.9 MB in the beginning and 67.2 MB in the end (delta: 94.7 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:15,947 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 196.1 MB. Free memory is still 178.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:29:15,948 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.00 ms. Allocated memory is still 196.1 MB. Free memory was 161.7 MB in the beginning and 152.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:15,954 INFO L168 Benchmark]: Boogie Preprocessor took 38.87 ms. Allocated memory is still 196.1 MB. Free memory was 152.0 MB in the beginning and 150.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:15,955 INFO L168 Benchmark]: RCFGBuilder took 340.29 ms. Allocated memory is still 196.1 MB. Free memory was 150.5 MB in the beginning and 166.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:15,955 INFO L168 Benchmark]: IcfgTransformer took 23.63 ms. Allocated memory is still 196.1 MB. Free memory was 166.1 MB in the beginning and 165.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:15,955 INFO L168 Benchmark]: TraceAbstraction took 3407.73 ms. Allocated memory is still 196.1 MB. Free memory was 164.5 MB in the beginning and 67.2 MB in the end (delta: 97.3 MB). Peak memory consumption was 97.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:15,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 196.1 MB. Free memory is still 178.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 181.00 ms. Allocated memory is still 196.1 MB. Free memory was 161.7 MB in the beginning and 152.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.87 ms. Allocated memory is still 196.1 MB. Free memory was 152.0 MB in the beginning and 150.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.29 ms. Allocated memory is still 196.1 MB. Free memory was 150.5 MB in the beginning and 166.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 23.63 ms. Allocated memory is still 196.1 MB. Free memory was 166.1 MB in the beginning and 165.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3407.73 ms. Allocated memory is still 196.1 MB. Free memory was 164.5 MB in the beginning and 67.2 MB in the end (delta: 97.3 MB). Peak memory consumption was 97.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3359.3ms, OverallIterations: 7, TraceHistogramMax: 8, EmptinessCheckTime: 18.3ms, AutomataDifference: 901.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 155 SDtfs, 84 SDslu, 498 SDs, 0 SdLazy, 485 SolverSat, 91 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 470.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 190 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 481.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 48.0ms SsaConstructionTime, 138.4ms SatisfiabilityAnalysisTime, 910.1ms InterpolantComputationTime, 194 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 187 ConstructedInterpolants, 0 QuantifiedInterpolants, 634 SizeOfPredicates, 14 NumberOfNonLiveVariables, 636 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 197/247 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...