/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/sqrt1-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:54:19,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:54:19,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:54:19,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:54:19,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:54:19,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:54:19,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:54:19,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:54:19,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:54:19,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:54:19,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:54:19,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:54:19,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:54:19,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:54:19,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:54:19,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:54:19,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:54:19,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:54:19,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:54:19,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:54:19,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:54:19,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:54:19,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:54:19,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:54:19,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:54:19,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:54:19,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:54:19,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:54:19,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:54:19,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:54:19,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:54:19,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:54:19,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:54:19,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:54:19,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:54:19,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:54:19,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:54:19,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:54:19,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:54:19,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:54:19,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:54:19,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:54:19,933 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:54:19,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:54:20,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:54:20,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:54:20,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:54:20,191 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:54:20,192 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:54:20,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c [2021-05-06 10:54:20,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5bf57ffb/ecbdce2c842c48cca5d0f1563dacb1b2/FLAG783005e82 [2021-05-06 10:54:20,564 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:54:20,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c [2021-05-06 10:54:20,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5bf57ffb/ecbdce2c842c48cca5d0f1563dacb1b2/FLAG783005e82 [2021-05-06 10:54:21,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5bf57ffb/ecbdce2c842c48cca5d0f1563dacb1b2 [2021-05-06 10:54:21,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:54:21,011 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:54:21,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:54:21,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:54:21,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:54:21,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a662d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21, skipping insertion in model container [2021-05-06 10:54:21,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:54:21,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:54:21,113 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/sqrt1-ll_valuebound50.c[520,533] [2021-05-06 10:54:21,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:54:21,125 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:54:21,132 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/sqrt1-ll_valuebound50.c[520,533] [2021-05-06 10:54:21,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:54:21,144 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:54:21,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21 WrapperNode [2021-05-06 10:54:21,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:54:21,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:54:21,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:54:21,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:54:21,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:54:21,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:54:21,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:54:21,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:54:21,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (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 [2021-05-06 10:54:21,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:54:21,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:54:21,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:54:21,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:54:21,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:54:21,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:54:21,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:54:21,256 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:54:21,256 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:54:21,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:54:21,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:54:21,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:54:21,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:54:21,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:54:21,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:54:21,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:54:21,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:54:21,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:54:21,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:54:21,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:54:21,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:54:21,471 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:54:21,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:21 BoogieIcfgContainer [2021-05-06 10:54:21,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:54:21,473 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:54:21,473 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:54:21,473 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:54:21,475 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:21" (1/1) ... [2021-05-06 10:54:21,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:54:21 BasicIcfg [2021-05-06 10:54:21,484 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:54:21,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:54:21,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:54:21,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:54:21,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:54:21" (1/4) ... [2021-05-06 10:54:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6328f561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:54:21, skipping insertion in model container [2021-05-06 10:54:21,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:21" (2/4) ... [2021-05-06 10:54:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6328f561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:54:21, skipping insertion in model container [2021-05-06 10:54:21,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:21" (3/4) ... [2021-05-06 10:54:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6328f561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:54:21, skipping insertion in model container [2021-05-06 10:54:21,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:54:21" (4/4) ... [2021-05-06 10:54:21,488 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound50.cJordan [2021-05-06 10:54:21,491 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:54:21,493 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:54:21,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:54:21,515 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:54:21,515 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:54:21,515 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:54:21,515 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:54:21,515 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:54:21,515 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:54:21,516 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:54:21,516 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:54:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:54:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:54:21,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:21,529 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:21,529 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:21,532 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-06 10:54:21,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:21,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286088403] [2021-05-06 10:54:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:21,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:54:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:54:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:21,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286088403] [2021-05-06 10:54:21,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286088403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:21,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:21,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:54:21,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603447356] [2021-05-06 10:54:21,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:54:21,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:54:21,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:54:21,741 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:21,851 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-06 10:54:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:54:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:54:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:21,857 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:54:21,858 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:54:21,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:54:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:54:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:54:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:54:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 10:54:21,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 10:54:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:21,886 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 10:54:21,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 10:54:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:54:21,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:21,887 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:21,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:54:21,887 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-06 10:54:21,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:21,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009363711] [2021-05-06 10:54:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:22,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:54:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:22,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:54:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:22,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009363711] [2021-05-06 10:54:22,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009363711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:22,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:22,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:54:22,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439056569] [2021-05-06 10:54:22,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:22,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:22,036 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:22,420 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 10:54:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:22,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:54:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:22,421 INFO L225 Difference]: With dead ends: 38 [2021-05-06 10:54:22,421 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:54:22,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:54:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:54:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-06 10:54:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:54:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 10:54:22,428 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-06 10:54:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:22,428 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 10:54:22,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 10:54:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:54:22,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:22,429 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:22,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 10:54:22,445 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-06 10:54:22,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:22,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216345096] [2021-05-06 10:54:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:22,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:22,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483167625] [2021-05-06 10:54:22,454 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 [2021-05-06 10:54:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:54:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:22,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:22,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:22,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216345096] [2021-05-06 10:54:22,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:22,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483167625] [2021-05-06 10:54:22,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483167625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:22,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:22,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:54:22,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415257533] [2021-05-06 10:54:22,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:54:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:22,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:54:22,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:54:22,661 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:54:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:22,706 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 10:54:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:54:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:54:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:22,708 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:54:22,708 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:54:22,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:54:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:54:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:54:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-05-06 10:54:22,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2021-05-06 10:54:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:22,713 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-05-06 10:54:22,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:54:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-05-06 10:54:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 10:54:22,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:22,713 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:22,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 10:54:22,925 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -88951989, now seen corresponding path program 1 times [2021-05-06 10:54:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:22,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783920585] [2021-05-06 10:54:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:22,932 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:22,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442299550] [2021-05-06 10:54:22,932 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 [2021-05-06 10:54:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:22,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:54:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:23,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:54:23,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:23,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783920585] [2021-05-06 10:54:23,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:23,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442299550] [2021-05-06 10:54:23,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442299550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:23,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:23,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:54:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197485968] [2021-05-06 10:54:23,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:54:23,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:23,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:54:23,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:54:23,077 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:54:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:23,120 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-05-06 10:54:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:54:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 10:54:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:23,121 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:54:23,121 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:54:23,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:54:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:54:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:54:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-06 10:54:23,125 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2021-05-06 10:54:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:23,125 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-06 10:54:23,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:54:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-06 10:54:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:54:23,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:23,126 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:23,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:23,343 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:23,343 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-06 10:54:23,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:23,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143738074] [2021-05-06 10:54:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:23,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:23,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120462991] [2021-05-06 10:54:23,350 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 [2021-05-06 10:54:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:23,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:54:23,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:23,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:54:23,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:23,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143738074] [2021-05-06 10:54:23,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:23,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120462991] [2021-05-06 10:54:23,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120462991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:23,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:23,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:23,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380516117] [2021-05-06 10:54:23,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:23,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:23,482 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:54:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:23,529 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-06 10:54:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 10:54:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:23,530 INFO L225 Difference]: With dead ends: 55 [2021-05-06 10:54:23,530 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:54:23,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:54:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 10:54:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:54:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 10:54:23,534 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2021-05-06 10:54:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:23,534 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 10:54:23,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:54:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 10:54:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 10:54:23,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:23,535 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:23,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:23,749 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-06 10:54:23,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:23,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052663518] [2021-05-06 10:54:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:23,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:23,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864221701] [2021-05-06 10:54:23,755 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 [2021-05-06 10:54:23,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:54:23,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:23,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:23,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:23,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:54:23,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:23,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052663518] [2021-05-06 10:54:23,907 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864221701] [2021-05-06 10:54:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864221701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:23,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:23,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69826852] [2021-05-06 10:54:23,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:23,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:23,909 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:54:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:23,963 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-06 10:54:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-06 10:54:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:23,965 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:54:23,965 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 10:54:23,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 10:54:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 10:54:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:54:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-06 10:54:23,972 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 39 [2021-05-06 10:54:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:23,972 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-06 10:54:23,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:54:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-06 10:54:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:54:23,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:23,973 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:24,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:24,174 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:24,174 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-06 10:54:24,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:24,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187037854] [2021-05-06 10:54:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:24,180 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:24,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233500857] [2021-05-06 10:54:24,180 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 [2021-05-06 10:54:24,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:54:24,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:24,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:24,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:24,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:54:24,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:24,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187037854] [2021-05-06 10:54:24,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:24,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233500857] [2021-05-06 10:54:24,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233500857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:24,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:24,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:24,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824057813] [2021-05-06 10:54:24,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:24,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:24,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:24,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:24,313 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:54:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:24,365 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-05-06 10:54:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:24,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 10:54:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:24,368 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:54:24,368 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 10:54:24,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 10:54:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 10:54:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:54:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 10:54:24,374 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2021-05-06 10:54:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:24,374 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 10:54:24,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:54:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 10:54:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 10:54:24,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:24,375 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:24,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:54:24,585 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-06 10:54:24,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:24,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538742344] [2021-05-06 10:54:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:24,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:24,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171212324] [2021-05-06 10:54:24,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 10:54:24,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:54:24,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:24,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:54:24,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:24,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538742344] [2021-05-06 10:54:24,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:24,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171212324] [2021-05-06 10:54:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171212324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:24,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:24,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:54:24,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157912416] [2021-05-06 10:54:24,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:54:24,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:54:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:24,752 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:24,819 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-06 10:54:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-06 10:54:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:24,820 INFO L225 Difference]: With dead ends: 72 [2021-05-06 10:54:24,821 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 10:54:24,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 10:54:24,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-06 10:54:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:54:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-05-06 10:54:24,824 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 51 [2021-05-06 10:54:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:24,825 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-05-06 10:54:24,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-05-06 10:54:24,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 10:54:24,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:24,826 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:25,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:25,026 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-06 10:54:25,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:25,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057324928] [2021-05-06 10:54:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:25,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:25,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141225594] [2021-05-06 10:54:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-05-06 10:54:25,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 10:54:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:54:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:25,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:54:25,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:25,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057324928] [2021-05-06 10:54:25,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:25,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141225594] [2021-05-06 10:54:25,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141225594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:25,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:25,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:54:25,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285163353] [2021-05-06 10:54:25,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:54:25,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:54:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:25,199 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:54:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:25,268 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-06 10:54:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 10:54:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:25,269 INFO L225 Difference]: With dead ends: 76 [2021-05-06 10:54:25,269 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 10:54:25,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 10:54:25,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 10:54:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:54:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-05-06 10:54:25,273 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 56 [2021-05-06 10:54:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:25,273 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-05-06 10:54:25,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:54:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-05-06 10:54:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:54:25,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:25,274 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:25,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:25,484 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-06 10:54:25,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:25,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571727124] [2021-05-06 10:54:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:25,490 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:25,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411333777] [2021-05-06 10:54:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-06 10:54:25,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 10:54:25,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:25,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 10:54:25,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:25,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 10:54:25,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:25,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571727124] [2021-05-06 10:54:25,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:25,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411333777] [2021-05-06 10:54:25,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411333777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:25,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:25,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:54:25,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616644174] [2021-05-06 10:54:25,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:54:25,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:54:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:54:25,726 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:54:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:25,879 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-05-06 10:54:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:54:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 10:54:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:25,881 INFO L225 Difference]: With dead ends: 84 [2021-05-06 10:54:25,881 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 10:54:25,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:54:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 10:54:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 10:54:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:54:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-05-06 10:54:25,884 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 61 [2021-05-06 10:54:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:25,885 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-05-06 10:54:25,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:54:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-05-06 10:54:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:54:25,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:25,885 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:26,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:54:26,093 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-06 10:54:26,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:26,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657926907] [2021-05-06 10:54:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:26,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:26,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788500849] [2021-05-06 10:54:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:54:26,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:26,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 10:54:26,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:26,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657926907] [2021-05-06 10:54:26,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:26,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788500849] [2021-05-06 10:54:26,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788500849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:26,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:26,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:54:26,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162105497] [2021-05-06 10:54:26,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:54:26,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:26,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:54:26,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:26,265 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:54:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:26,335 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-06 10:54:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:54:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-06 10:54:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:26,336 INFO L225 Difference]: With dead ends: 89 [2021-05-06 10:54:26,336 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 10:54:26,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:54:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 10:54:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-05-06 10:54:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 10:54:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-05-06 10:54:26,340 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 68 [2021-05-06 10:54:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:26,340 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-05-06 10:54:26,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:54:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-05-06 10:54:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 10:54:26,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:26,341 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:26,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:26,557 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1331766697, now seen corresponding path program 8 times [2021-05-06 10:54:26,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:26,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874297852] [2021-05-06 10:54:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:26,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:26,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610680809] [2021-05-06 10:54:26,562 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:26,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:54:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 10:54:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 10:54:26,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:26,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874297852] [2021-05-06 10:54:26,796 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:26,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610680809] [2021-05-06 10:54:26,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610680809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:26,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:26,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:54:26,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721364685] [2021-05-06 10:54:26,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:54:26,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:54:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:54:26,798 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 10:54:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:26,948 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-05-06 10:54:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:54:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2021-05-06 10:54:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:26,949 INFO L225 Difference]: With dead ends: 93 [2021-05-06 10:54:26,949 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:54:26,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:54:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:54:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 10:54:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 10:54:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 10:54:26,952 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 73 [2021-05-06 10:54:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:26,952 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 10:54:26,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 10:54:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 10:54:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 10:54:26,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:26,953 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:27,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:27,154 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:27,154 INFO L82 PathProgramCache]: Analyzing trace with hash -715048783, now seen corresponding path program 9 times [2021-05-06 10:54:27,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:27,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105406261] [2021-05-06 10:54:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:27,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:27,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708642301] [2021-05-06 10:54:27,159 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:27,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 10:54:27,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:27,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 10:54:27,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:27,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:29,853 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-06 10:54:29,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:29,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:29,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-06 10:54:29,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:29,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105406261] [2021-05-06 10:54:29,890 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:29,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708642301] [2021-05-06 10:54:29,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708642301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:29,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:29,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:54:29,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731781746] [2021-05-06 10:54:29,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:54:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:54:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=1, NotChecked=0, Total=72 [2021-05-06 10:54:29,891 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:30,179 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2021-05-06 10:54:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:54:30,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 10:54:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:30,179 INFO L225 Difference]: With dead ends: 90 [2021-05-06 10:54:30,179 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:54:30,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2522.7ms TimeCoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-05-06 10:54:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:54:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:54:30,180 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) [2021-05-06 10:54:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:54:30,180 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 78 [2021-05-06 10:54:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:30,180 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:54:30,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:54:30,180 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:54:30,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 10:54:30,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:54:30 BasicIcfg [2021-05-06 10:54:30,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:54:30,388 INFO L168 Benchmark]: Toolchain (without parser) took 9377.08 ms. Allocated memory was 184.5 MB in the beginning and 223.3 MB in the end (delta: 38.8 MB). Free memory was 149.7 MB in the beginning and 191.9 MB in the end (delta: -42.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:54:30,388 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory is still 166.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:54:30,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 121.79 ms. Allocated memory is still 184.5 MB. Free memory was 149.6 MB in the beginning and 139.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:30,389 INFO L168 Benchmark]: Boogie Preprocessor took 48.61 ms. Allocated memory is still 184.5 MB. Free memory was 139.8 MB in the beginning and 168.5 MB in the end (delta: -28.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:30,389 INFO L168 Benchmark]: RCFGBuilder took 278.19 ms. Allocated memory is still 184.5 MB. Free memory was 168.5 MB in the beginning and 152.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:30,389 INFO L168 Benchmark]: IcfgTransformer took 11.02 ms. Allocated memory is still 184.5 MB. Free memory was 152.8 MB in the beginning and 151.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:30,389 INFO L168 Benchmark]: TraceAbstraction took 8903.47 ms. Allocated memory was 184.5 MB in the beginning and 223.3 MB in the end (delta: 38.8 MB). Free memory was 151.2 MB in the beginning and 191.9 MB in the end (delta: -40.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:54:30,389 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory is still 166.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 121.79 ms. Allocated memory is still 184.5 MB. Free memory was 149.6 MB in the beginning and 139.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.61 ms. Allocated memory is still 184.5 MB. Free memory was 139.8 MB in the beginning and 168.5 MB in the end (delta: -28.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.19 ms. Allocated memory is still 184.5 MB. Free memory was 168.5 MB in the beginning and 152.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.02 ms. Allocated memory is still 184.5 MB. Free memory was 152.8 MB in the beginning and 151.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8903.47 ms. Allocated memory was 184.5 MB in the beginning and 223.3 MB in the end (delta: 38.8 MB). Free memory was 151.2 MB in the beginning and 191.9 MB in the end (delta: -40.7 MB). There was no memory consumed. 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8871.6ms, OverallIterations: 13, TraceHistogramMax: 12, EmptinessCheckTime: 13.3ms, AutomataDifference: 1574.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 434 SDtfs, 125 SDslu, 1597 SDs, 0 SdLazy, 1085 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 996.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3125.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=12, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.0ms AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 87.8ms SsaConstructionTime, 331.0ms SatisfiabilityAnalysisTime, 4017.9ms InterpolantComputationTime, 587 NumberOfCodeBlocks, 537 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 1673 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1734 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 1028/1126 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...