/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-scaling/fermat2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:47:10,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:47:10,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:47:10,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:47:10,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:47:10,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:47:10,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:47:10,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:47:10,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:47:10,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:47:10,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:47:10,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:47:10,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:47:10,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:47:10,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:47:10,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:47:10,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:47:10,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:47:10,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:47:10,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:47:10,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:47:10,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:47:10,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:47:10,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:47:10,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:47:10,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:47:10,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:47:10,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:47:10,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:47:10,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:47:10,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:47:10,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:47:10,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:47:10,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:47:10,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:47:10,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:47:10,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:47:10,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:47:10,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:47:10,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:47:10,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:47:10,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:47:10,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:47:10,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:47:10,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:47:10,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:47:10,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:47:10,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:47:10,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:47:10,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:47:10,246 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:47:10,246 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:47:10,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:47:10,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:47:10,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:47:10,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:47:10,490 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:47:10,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound20.c [2021-05-02 20:47:10,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b2f5833/dbc0561c39454c548f960ba79d093e76/FLAGc81e38e6b [2021-05-02 20:47:10,894 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:47:10,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound20.c [2021-05-02 20:47:10,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b2f5833/dbc0561c39454c548f960ba79d093e76/FLAGc81e38e6b [2021-05-02 20:47:10,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b2f5833/dbc0561c39454c548f960ba79d093e76 [2021-05-02 20:47:10,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:47:10,914 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:47:10,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:47:10,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:47:10,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:47:10,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:47:10" (1/1) ... [2021-05-02 20:47:10,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac80d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:10, skipping insertion in model container [2021-05-02 20:47:10,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:47:10" (1/1) ... [2021-05-02 20:47:10,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:47:10,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:47:11,046 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-scaling/fermat2-ll_valuebound20.c[524,537] [2021-05-02 20:47:11,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:47:11,070 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:47:11,111 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-scaling/fermat2-ll_valuebound20.c[524,537] [2021-05-02 20:47:11,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:47:11,137 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:47:11,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11 WrapperNode [2021-05-02 20:47:11,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:47:11,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:47:11,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:47:11,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:47:11,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:47:11,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:47:11,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:47:11,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:47:11,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (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 20:47:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:47:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:47:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:47:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:47:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:47:11,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:47:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:47:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:47:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:47:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:47:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:47:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:47:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:47:11,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:47:11,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:47:11,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:47:11,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:47:11,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:47:11,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:47:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:47:11,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:47:11,454 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:47:11,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:47:11 BoogieIcfgContainer [2021-05-02 20:47:11,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:47:11,455 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:47:11,455 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:47:11,456 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:47:11,457 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:47:11" (1/1) ... [2021-05-02 20:47:11,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:47:11 BasicIcfg [2021-05-02 20:47:11,467 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:47:11,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:47:11,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:47:11,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:47:11,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:47:10" (1/4) ... [2021-05-02 20:47:11,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caffa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:47:11, skipping insertion in model container [2021-05-02 20:47:11,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:47:11" (2/4) ... [2021-05-02 20:47:11,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caffa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:47:11, skipping insertion in model container [2021-05-02 20:47:11,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:47:11" (3/4) ... [2021-05-02 20:47:11,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caffa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:47:11, skipping insertion in model container [2021-05-02 20:47:11,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:47:11" (4/4) ... [2021-05-02 20:47:11,472 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound20.cJordan [2021-05-02 20:47:11,475 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:47:11,477 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:47:11,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:47:11,497 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:47:11,497 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:47:11,497 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:47:11,497 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:47:11,497 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:47:11,497 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:47:11,498 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:47:11,498 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:47:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:47:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:47:11,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:11,510 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:11,510 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1450325676, now seen corresponding path program 1 times [2021-05-02 20:47:11,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:11,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693274803] [2021-05-02 20:47:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:11,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:47:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:11,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:47:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:11,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:47:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:11,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:47:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:47:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:47:11,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:11,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693274803] [2021-05-02 20:47:11,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693274803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:47:11,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:47:11,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:47:11,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377065657] [2021-05-02 20:47:11,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:47:11,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:11,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:47:11,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:47:11,723 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:11,784 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 20:47:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:47:11,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:47:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:11,789 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:47:11,790 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:47:11,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:47:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:47:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:47:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:47:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 20:47:11,814 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 20:47:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:11,814 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 20:47:11,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 20:47:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:47:11,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:11,816 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:11,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:47:11,816 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:11,816 INFO L82 PathProgramCache]: Analyzing trace with hash 512475503, now seen corresponding path program 1 times [2021-05-02 20:47:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:11,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271729793] [2021-05-02 20:47:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:11,832 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:11,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839128560] [2021-05-02 20:47:11,833 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 20:47:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:47:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:11,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:11,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:47:12,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:12,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271729793] [2021-05-02 20:47:12,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:12,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839128560] [2021-05-02 20:47:12,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839128560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:12,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:12,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:47:12,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931288017] [2021-05-02 20:47:12,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:47:12,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:12,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:47:12,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:47:12,177 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:12,301 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 20:47:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:47:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:47:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:12,303 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:47:12,303 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:47:12,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:47:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:47:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:47:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:47:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 20:47:12,308 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 20:47:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:12,309 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 20:47:12,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:47:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 20:47:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:47:12,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:12,310 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:12,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:47:12,517 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash -397056057, now seen corresponding path program 1 times [2021-05-02 20:47:12,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:12,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482969920] [2021-05-02 20:47:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:12,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:12,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307006400] [2021-05-02 20:47:12,530 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 20:47:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:12,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:47:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:12,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:47:12,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:12,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482969920] [2021-05-02 20:47:12,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:12,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307006400] [2021-05-02 20:47:12,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307006400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:12,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:12,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:47:12,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420123705] [2021-05-02 20:47:12,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:47:12,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:47:12,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:47:12,736 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:47:15,561 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 20:47:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:20,751 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-05-02 20:47:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:47:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:47:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:20,754 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:47:20,754 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:47:20,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:47:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:47:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:47:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:47:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 20:47:20,757 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 39 [2021-05-02 20:47:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:20,757 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 20:47:20,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:47:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 20:47:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:47:20,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:20,758 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:20,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:20,959 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1822507357, now seen corresponding path program 1 times [2021-05-02 20:47:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:20,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755395856] [2021-05-02 20:47:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:20,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:20,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146402351] [2021-05-02 20:47:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:47:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:47:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:21,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:47:21,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:21,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755395856] [2021-05-02 20:47:21,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:21,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146402351] [2021-05-02 20:47:21,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146402351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:21,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:21,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:47:21,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565829996] [2021-05-02 20:47:21,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:47:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:47:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:47:21,268 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:47:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:23,808 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-02 20:47:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:47:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:47:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:23,810 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:47:23,810 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:47:23,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:47:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:47:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 20:47:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:47:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 20:47:23,814 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 41 [2021-05-02 20:47:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:23,814 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 20:47:23,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:47:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 20:47:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:47:23,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:23,815 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:24,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:24,021 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1603865781, now seen corresponding path program 2 times [2021-05-02 20:47:24,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:24,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718792265] [2021-05-02 20:47:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:24,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:24,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496166092] [2021-05-02 20:47:24,029 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 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 20:47:24,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:47:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:47:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:47:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:24,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:47:24,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718792265] [2021-05-02 20:47:24,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496166092] [2021-05-02 20:47:24,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496166092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:24,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:24,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:47:24,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454347454] [2021-05-02 20:47:24,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:47:24,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:47:24,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:47:24,313 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:47:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:26,637 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 20:47:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:47:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 20:47:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:26,638 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:47:26,638 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:47:26,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:47:26,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:47:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 20:47:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:47:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 20:47:26,643 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 20:47:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:26,643 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 20:47:26,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:47:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 20:47:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 20:47:26,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:26,644 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:26,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:26,853 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1737152313, now seen corresponding path program 3 times [2021-05-02 20:47:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:26,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048813041] [2021-05-02 20:47:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:26,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:26,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049035719] [2021-05-02 20:47:26,861 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 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 20:47:26,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:47:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:47:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:47:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:26,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 20:47:26,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:26,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048813041] [2021-05-02 20:47:26,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:26,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049035719] [2021-05-02 20:47:26,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049035719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:26,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:26,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:47:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713010657] [2021-05-02 20:47:27,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:47:27,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:47:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:47:27,000 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:47:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:31,062 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-05-02 20:47:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:47:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 20:47:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:31,063 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:47:31,064 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:47:31,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:47:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:47:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 20:47:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:47:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 20:47:31,068 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 20:47:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:31,068 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 20:47:31,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:47:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 20:47:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:47:31,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:31,069 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:31,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:47:31,273 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:31,273 INFO L82 PathProgramCache]: Analyzing trace with hash -479214138, now seen corresponding path program 1 times [2021-05-02 20:47:31,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:31,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436009844] [2021-05-02 20:47:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:31,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:31,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820027947] [2021-05-02 20:47:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 20:47:31,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:31,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:31,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:44,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:44,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:47:44,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:44,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436009844] [2021-05-02 20:47:44,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:44,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820027947] [2021-05-02 20:47:44,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820027947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:44,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:44,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:47:44,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70337868] [2021-05-02 20:47:44,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:47:44,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:44,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:47:44,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=229, Unknown=2, NotChecked=0, Total=272 [2021-05-02 20:47:44,319 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 20:48:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:35,927 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2021-05-02 20:48:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:48:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-02 20:48:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:35,942 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:48:35,942 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:48:35,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 12789.8ms TimeCoverageRelationStatistics Valid=74, Invalid=430, Unknown=2, NotChecked=0, Total=506 [2021-05-02 20:48:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:48:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 82. [2021-05-02 20:48:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:48:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-05-02 20:48:35,948 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 65 [2021-05-02 20:48:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:35,948 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-05-02 20:48:35,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 20:48:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-05-02 20:48:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:48:35,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:35,949 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:48:36,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:36,156 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:36,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2076715181, now seen corresponding path program 2 times [2021-05-02 20:48:36,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:36,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255637611] [2021-05-02 20:48:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:36,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:48:36,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869444392] [2021-05-02 20:48:36,194 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:36,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:48:36,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:48:36,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:48:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:48:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 20:48:36,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255637611] [2021-05-02 20:48:36,495 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869444392] [2021-05-02 20:48:36,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869444392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:48:36,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:48:36,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:48:36,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155819537] [2021-05-02 20:48:36,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:48:36,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:48:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:48:36,497 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:48:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:36,736 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2021-05-02 20:48:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:48:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2021-05-02 20:48:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:36,737 INFO L225 Difference]: With dead ends: 88 [2021-05-02 20:48:36,737 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 20:48:36,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:48:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 20:48:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 20:48:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 62 states have internal predecessors, (70), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:48:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2021-05-02 20:48:36,743 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 73 [2021-05-02 20:48:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:36,743 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2021-05-02 20:48:36,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:48:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2021-05-02 20:48:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:48:36,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:36,744 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:48:36,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:36,959 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash 685754451, now seen corresponding path program 3 times [2021-05-02 20:48:36,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:36,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205402513] [2021-05-02 20:48:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:36,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:48:36,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032076116] [2021-05-02 20:48:36,966 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:37,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:48:37,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:48:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:48:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:48:37,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:48:37,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205402513] [2021-05-02 20:48:37,285 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032076116] [2021-05-02 20:48:37,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032076116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:48:37,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:48:37,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:48:37,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150096135] [2021-05-02 20:48:37,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:48:37,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:48:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:48:37,287 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:48:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:49,653 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2021-05-02 20:48:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:48:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 20:48:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:49,654 INFO L225 Difference]: With dead ends: 98 [2021-05-02 20:48:49,654 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:48:49,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:48:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:48:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:48:49,654 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 20:48:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:48:49,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 20:48:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:49,655 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:48:49,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:48:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:48:49,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:48:49,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:48:49,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:48:49 BasicIcfg [2021-05-02 20:48:49,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:48:49,859 INFO L168 Benchmark]: Toolchain (without parser) took 98944.94 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 170.4 MB in the beginning and 179.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 31.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:49,859 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 186.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:48:49,859 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.85 ms. Allocated memory is still 204.5 MB. Free memory was 170.1 MB in the beginning and 187.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:49,859 INFO L168 Benchmark]: Boogie Preprocessor took 32.15 ms. Allocated memory is still 204.5 MB. Free memory was 187.7 MB in the beginning and 186.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:49,860 INFO L168 Benchmark]: RCFGBuilder took 284.02 ms. Allocated memory is still 204.5 MB. Free memory was 186.1 MB in the beginning and 170.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:49,860 INFO L168 Benchmark]: IcfgTransformer took 12.17 ms. Allocated memory is still 204.5 MB. Free memory was 170.9 MB in the beginning and 169.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:49,860 INFO L168 Benchmark]: TraceAbstraction took 98390.43 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.3 MB in the beginning and 179.7 MB in the end (delta: -10.4 MB). Peak memory consumption was 30.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:49,861 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 186.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 219.85 ms. Allocated memory is still 204.5 MB. Free memory was 170.1 MB in the beginning and 187.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.15 ms. Allocated memory is still 204.5 MB. Free memory was 187.7 MB in the beginning and 186.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.02 ms. Allocated memory is still 204.5 MB. Free memory was 186.1 MB in the beginning and 170.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.17 ms. Allocated memory is still 204.5 MB. Free memory was 170.9 MB in the beginning and 169.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 98390.43 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.3 MB in the beginning and 179.7 MB in the end (delta: -10.4 MB). Peak memory consumption was 30.8 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 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 98360.2ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 13.2ms, AutomataDifference: 81392.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 226 SDtfs, 168 SDslu, 1278 SDs, 0 SdLazy, 1351 SolverSat, 84 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 79741.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 14183.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=8, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 59 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 81.4ms SsaConstructionTime, 330.7ms SatisfiabilityAnalysisTime, 14472.5ms InterpolantComputationTime, 463 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 3051 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 392/538 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...