/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/fermat1-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:34:15,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:34:15,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:34:15,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:34:15,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:34:15,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:34:15,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:34:15,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:34:15,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:34:15,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:34:15,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:34:15,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:34:15,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:34:15,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:34:15,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:34:15,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:34:15,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:34:15,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:34:15,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:34:15,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:34:15,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:34:15,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:34:15,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:34:15,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:34:15,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:34:15,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:34:15,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:34:15,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:34:15,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:34:15,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:34:15,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:34:15,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:34:15,291 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:34:15,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:34:15,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:34:15,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:34:15,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:34:15,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:34:15,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:34:15,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:34:15,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:34:15,293 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:34:15,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:34:15,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:34:15,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:34:15,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:34:15,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:34:15,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:15,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:34:15,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:34:15,295 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:34:15,295 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:34:15,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:34:15,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:34:15,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:34:15,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:34:15,577 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:34:15,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-05-02 20:34:15,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742008e82/023beb04bc3a408085224afdf5a38dff/FLAG779959b87 [2021-05-02 20:34:15,983 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:34:15,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-05-02 20:34:15,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742008e82/023beb04bc3a408085224afdf5a38dff/FLAG779959b87 [2021-05-02 20:34:16,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742008e82/023beb04bc3a408085224afdf5a38dff [2021-05-02 20:34:16,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:34:16,419 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:34:16,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:16,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:34:16,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:34:16,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef5a6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16, skipping insertion in model container [2021-05-02 20:34:16,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:34:16,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:34:16,515 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/fermat1-ll_unwindbound2.c[535,548] [2021-05-02 20:34:16,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:16,556 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:34:16,609 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/fermat1-ll_unwindbound2.c[535,548] [2021-05-02 20:34:16,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:16,636 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:34:16,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16 WrapperNode [2021-05-02 20:34:16,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:16,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:34:16,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:34:16,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:34:16,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:16,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:34:16,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:34:16,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:34:16,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:34:16,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:34:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:34:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:34:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:34:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:34:16,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:34:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:34:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:34:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:34:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:34:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:34:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:34:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:34:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:34:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:34:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:34:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:34:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:34:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:34:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:34:16,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:34:16,980 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:34:16,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:16 BoogieIcfgContainer [2021-05-02 20:34:16,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:34:16,981 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:34:16,982 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:34:16,982 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:34:16,984 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:16" (1/1) ... [2021-05-02 20:34:17,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:17 BasicIcfg [2021-05-02 20:34:17,033 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:34:17,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:34:17,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:34:17,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:34:17,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:34:16" (1/4) ... [2021-05-02 20:34:17,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a04420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:17, skipping insertion in model container [2021-05-02 20:34:17,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:16" (2/4) ... [2021-05-02 20:34:17,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a04420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:17, skipping insertion in model container [2021-05-02 20:34:17,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:16" (3/4) ... [2021-05-02 20:34:17,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a04420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:17, skipping insertion in model container [2021-05-02 20:34:17,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:17" (4/4) ... [2021-05-02 20:34:17,038 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound2.cJordan [2021-05-02 20:34:17,041 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:34:17,056 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:34:17,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:34:17,086 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:34:17,087 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:34:17,087 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:34:17,087 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:34:17,087 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:34:17,087 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:34:17,087 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:34:17,087 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:34:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:34:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:34:17,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:17,112 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:17,112 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:17,116 INFO L82 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2021-05-02 20:34:17,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:17,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054308704] [2021-05-02 20:34:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:17,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:17,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871394962] [2021-05-02 20:34:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:34:17,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:34:17,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054308704] [2021-05-02 20:34:17,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871394962] [2021-05-02 20:34:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871394962] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:17,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:17,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:34:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119788795] [2021-05-02 20:34:17,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:34:17,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:34:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:34:17,464 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:17,474 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-02 20:34:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:34:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:34:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:17,479 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:34:17,479 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:34:17,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:34:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:34:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:34:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:34:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 20:34:17,502 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-02 20:34:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:17,502 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 20:34:17,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 20:34:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:34:17,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:17,503 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:17,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:34:17,717 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2021-05-02 20:34:17,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:17,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907333598] [2021-05-02 20:34:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:17,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:17,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701075779] [2021-05-02 20:34:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:34:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:17,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:17,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:17,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:17,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:17,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:34:17,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:17,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907333598] [2021-05-02 20:34:17,870 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:17,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701075779] [2021-05-02 20:34:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701075779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:17,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:17,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:34:17,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555484113] [2021-05-02 20:34:17,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:34:17,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:34:17,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:34:17,873 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:17,884 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-05-02 20:34:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:34:17,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:34:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:17,885 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:34:17,885 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:34:17,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:34:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:34:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:34:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:34:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 20:34:17,890 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-02 20:34:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:17,891 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 20:34:17,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 20:34:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:34:17,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:17,892 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:18,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:18,109 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:18,110 INFO L82 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2021-05-02 20:34:18,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:18,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603532862] [2021-05-02 20:34:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:18,119 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:18,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093575260] [2021-05-02 20:34:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:34:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:18,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:18,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:18,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:18,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:34:18,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:18,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603532862] [2021-05-02 20:34:18,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:18,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093575260] [2021-05-02 20:34:18,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093575260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:18,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:18,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:18,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313019282] [2021-05-02 20:34:18,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:18,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:18,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:18,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:18,303 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:30,028 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-02 20:34:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:34:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:34:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:30,030 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:34:30,030 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:34:30,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:34:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:34:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:34:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-02 20:34:30,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-02 20:34:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:30,037 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-02 20:34:30,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-02 20:34:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:34:30,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:30,038 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:30,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:30,238 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2021-05-02 20:34:30,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:30,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421327124] [2021-05-02 20:34:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:30,248 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:30,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271343019] [2021-05-02 20:34:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:34:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:30,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:34:30,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:30,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421327124] [2021-05-02 20:34:30,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:30,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271343019] [2021-05-02 20:34:30,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271343019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:30,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:30,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:34:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652774659] [2021-05-02 20:34:30,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:34:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:34:30,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:30,733 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:34:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:39,983 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 20:34:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:34:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:34:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:39,985 INFO L225 Difference]: With dead ends: 70 [2021-05-02 20:34:39,985 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:34:39,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:34:39,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:34:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-05-02 20:34:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 47 states have internal predecessors, (57), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:34:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2021-05-02 20:34:39,993 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 29 [2021-05-02 20:34:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:39,994 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2021-05-02 20:34:39,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:34:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2021-05-02 20:34:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:34:39,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:39,995 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:40,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:40,211 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2021-05-02 20:34:40,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:40,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432573842] [2021-05-02 20:34:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:40,220 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:40,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185623231] [2021-05-02 20:34:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:40,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:34:40,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:40,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:34:40,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:40,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432573842] [2021-05-02 20:34:40,397 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:40,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185623231] [2021-05-02 20:34:40,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185623231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:40,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:40,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998850937] [2021-05-02 20:34:40,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:40,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:40,399 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:34:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:40,430 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-05-02 20:34:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:34:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 20:34:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:40,434 INFO L225 Difference]: With dead ends: 71 [2021-05-02 20:34:40,436 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 20:34:40,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 20:34:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 20:34:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 53 states have internal predecessors, (63), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:34:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-05-02 20:34:40,451 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 35 [2021-05-02 20:34:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:40,451 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-05-02 20:34:40,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:34:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-05-02 20:34:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:34:40,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:40,452 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:40,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:40,671 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash -827702321, now seen corresponding path program 1 times [2021-05-02 20:34:40,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:40,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784063336] [2021-05-02 20:34:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:40,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:40,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900255651] [2021-05-02 20:34:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:40,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:34:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:40,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:34:40,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:40,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784063336] [2021-05-02 20:34:40,793 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:40,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900255651] [2021-05-02 20:34:40,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900255651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:40,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:40,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:34:40,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251110552] [2021-05-02 20:34:40,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:34:40,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:34:40,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:34:40,794 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:34:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:40,830 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2021-05-02 20:34:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 20:34:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:40,831 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:34:40,831 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:34:40,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:34:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:34:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 51 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:34:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-05-02 20:34:40,835 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 39 [2021-05-02 20:34:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:40,835 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-05-02 20:34:40,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:34:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-05-02 20:34:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:34:40,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:40,836 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:41,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:41,056 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:41,056 INFO L82 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2021-05-02 20:34:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:41,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29854856] [2021-05-02 20:34:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:41,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:41,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948700197] [2021-05-02 20:34:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:34:41,101 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:34:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:34:41,126 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:34:41,206 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:34:41,207 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:34:41,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:41,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:41 BasicIcfg [2021-05-02 20:34:41,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:34:41,445 INFO L168 Benchmark]: Toolchain (without parser) took 25025.75 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 126.2 MB in the beginning and 75.0 MB in the end (delta: 51.3 MB). Peak memory consumption was 83.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:41,445 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 162.5 MB. Free memory is still 143.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:34:41,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.65 ms. Allocated memory is still 162.5 MB. Free memory was 126.1 MB in the beginning and 144.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:41,445 INFO L168 Benchmark]: Boogie Preprocessor took 34.96 ms. Allocated memory is still 162.5 MB. Free memory was 144.9 MB in the beginning and 143.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:41,445 INFO L168 Benchmark]: RCFGBuilder took 307.62 ms. Allocated memory is still 162.5 MB. Free memory was 143.4 MB in the beginning and 126.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:41,445 INFO L168 Benchmark]: IcfgTransformer took 51.62 ms. Allocated memory is still 162.5 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:41,445 INFO L168 Benchmark]: TraceAbstraction took 24410.31 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 125.0 MB in the beginning and 75.0 MB in the end (delta: 50.1 MB). Peak memory consumption was 84.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:41,446 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 162.5 MB. Free memory is still 143.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 215.65 ms. Allocated memory is still 162.5 MB. Free memory was 126.1 MB in the beginning and 144.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.96 ms. Allocated memory is still 162.5 MB. Free memory was 144.9 MB in the beginning and 143.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.62 ms. Allocated memory is still 162.5 MB. Free memory was 143.4 MB in the beginning and 126.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 51.62 ms. Allocated memory is still 162.5 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24410.31 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 125.0 MB in the beginning and 75.0 MB in the end (delta: 50.1 MB). Peak memory consumption was 84.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=11, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=5, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=5, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=5, counter=0, R=2, r=-1, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=1, counter++=0, R=2, r=-1, u=5, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=1, R=2, r=-1, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=5, counter=1, R=2, r=-1, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=5, counter=2, counter++=1, r=-1, R=2, u=5, v=1] [L39] COND TRUE counter++<2 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=2, R=2, r=-1, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=5, counter=2, R=2, r=-1, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=3, counter++=2, R=2, r=-1, u=5, v=1] [L47] COND FALSE !(counter++<2) [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=4, counter++=3, r=-1, R=2, u=5, v=1] [L34] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=4] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24337.9ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 11.0ms, AutomataDifference: 21096.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 227 SDtfs, 119 SDslu, 560 SDs, 0 SdLazy, 314 SolverSat, 37 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 20813.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 306.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=5, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.8ms SsaConstructionTime, 152.7ms SatisfiabilityAnalysisTime, 844.1ms InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 165 ConstructedInterpolants, 7 QuantifiedInterpolants, 629 SizeOfPredicates, 14 NumberOfNonLiveVariables, 828 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 33/41 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...