/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/bresenham-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:29:39,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:29:39,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:29:39,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:29:39,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:29:39,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:29:39,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:29:39,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:29:39,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:29:39,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:29:39,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:29:39,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:29:39,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:29:39,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:29:39,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:29:39,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:29:39,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:29:39,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:29:39,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:29:39,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:29:39,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:29:39,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:29:39,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:29:39,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:29:39,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:29:39,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:29:39,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:29:39,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:29:39,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:29:39,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:29:39,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:29:39,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:29:39,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:29:39,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:29:39,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:29:39,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:29:39,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:29:39,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:29:39,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:29:39,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:29:39,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:29:39,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:29:39,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:29:39,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:29:39,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:29:39,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:29:39,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:29:39,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:29:39,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:29:39,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:29:39,931 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:29:39,931 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:29:40,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:29:40,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:29:40,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:29:40,214 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:29:40,215 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:29:40,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-05-02 19:29:40,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/939a91809/fd80cbb67b32422ab8d713c22954d028/FLAG5605a9f07 [2021-05-02 19:29:40,646 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:29:40,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-05-02 19:29:40,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/939a91809/fd80cbb67b32422ab8d713c22954d028/FLAG5605a9f07 [2021-05-02 19:29:40,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/939a91809/fd80cbb67b32422ab8d713c22954d028 [2021-05-02 19:29:40,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:29:40,667 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:29:40,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:40,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:29:40,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:29:40,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef7367e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40, skipping insertion in model container [2021-05-02 19:29:40,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:29:40,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:29:40,767 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/bresenham-ll_unwindbound2.c[597,610] [2021-05-02 19:29:40,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:40,782 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:29:40,790 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/bresenham-ll_unwindbound2.c[597,610] [2021-05-02 19:29:40,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:40,815 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:29:40,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40 WrapperNode [2021-05-02 19:29:40,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:40,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:29:40,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:29:40,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:29:40,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... [2021-05-02 19:29:40,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:29:40,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:29:40,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:29:40,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:29:40,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:29:40,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:29:40,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:29:40,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:29:40,939 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:29:40,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:29:40,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:29:40,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:29:40,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:29:40,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:29:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:29:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:29:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:29:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:29:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:29:40,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:29:40,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:29:40,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:29:40,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:29:40,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:29:40,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:29:41,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:29:41,167 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:29:41,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:41 BoogieIcfgContainer [2021-05-02 19:29:41,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:29:41,169 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:29:41,169 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:29:41,169 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:29:41,171 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:41" (1/1) ... [2021-05-02 19:29:41,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:41 BasicIcfg [2021-05-02 19:29:41,183 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:29:41,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:29:41,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:29:41,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:29:41,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:29:40" (1/4) ... [2021-05-02 19:29:41,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bf9c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:41, skipping insertion in model container [2021-05-02 19:29:41,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:40" (2/4) ... [2021-05-02 19:29:41,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bf9c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:41, skipping insertion in model container [2021-05-02 19:29:41,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:41" (3/4) ... [2021-05-02 19:29:41,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bf9c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:41, skipping insertion in model container [2021-05-02 19:29:41,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:41" (4/4) ... [2021-05-02 19:29:41,187 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.cJordan [2021-05-02 19:29:41,191 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:29:41,206 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:29:41,217 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:29:41,230 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:29:41,231 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:29:41,231 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:29:41,231 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:29:41,231 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:29:41,231 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:29:41,231 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:29:41,231 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:29:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:29:41,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:41,245 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:41,245 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:41,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:41,249 INFO L82 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2021-05-02 19:29:41,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:41,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723205900] [2021-05-02 19:29:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:41,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:29:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:41,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:41,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723205900] [2021-05-02 19:29:41,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723205900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:41,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:41,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:29:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769846102] [2021-05-02 19:29:41,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:29:41,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:29:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:41,457 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:41,515 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 19:29:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:29:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:29:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:41,522 INFO L225 Difference]: With dead ends: 26 [2021-05-02 19:29:41,522 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 19:29:41,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 19:29:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 19:29:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 19:29:41,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 19:29:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:41,544 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 19:29:41,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 19:29:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:29:41,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:41,545 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:41,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:29:41,545 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2021-05-02 19:29:41,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:41,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431385795] [2021-05-02 19:29:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:41,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:41,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150596715] [2021-05-02 19:29:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:41,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 19:29:41,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:41,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431385795] [2021-05-02 19:29:41,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150596715] [2021-05-02 19:29:41,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150596715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:41,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:41,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:29:41,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450576256] [2021-05-02 19:29:41,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:29:41,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:41,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:29:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:41,737 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:41,849 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-02 19:29:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:29:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:41,851 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:29:41,851 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 19:29:41,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:29:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 19:29:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 19:29:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 19:29:41,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-02 19:29:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:41,855 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 19:29:41,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 19:29:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:29:41,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:41,856 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:42,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:29:42,061 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:42,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2021-05-02 19:29:42,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:42,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869392357] [2021-05-02 19:29:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:42,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:42,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365423325] [2021-05-02 19:29:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:42,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:29:42,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:42,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:42,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869392357] [2021-05-02 19:29:42,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365423325] [2021-05-02 19:29:42,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365423325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:42,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:42,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:29:42,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769147140] [2021-05-02 19:29:42,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:29:42,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:29:42,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:29:42,311 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:42,434 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-05-02 19:29:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:29:42,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 19:29:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:42,437 INFO L225 Difference]: With dead ends: 42 [2021-05-02 19:29:42,438 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 19:29:42,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:29:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 19:29:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 19:29:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 19:29:42,442 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-05-02 19:29:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:42,443 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 19:29:42,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 19:29:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:29:42,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:42,443 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:42,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:42,657 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash -642681530, now seen corresponding path program 1 times [2021-05-02 19:29:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:42,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841055634] [2021-05-02 19:29:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:42,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:42,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197880918] [2021-05-02 19:29:42,666 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 19:29:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:42,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:29:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:42,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:42,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:42,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:42,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:42,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841055634] [2021-05-02 19:29:42,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:42,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197880918] [2021-05-02 19:29:42,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197880918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:42,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:42,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:29:42,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367304068] [2021-05-02 19:29:42,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:29:42,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:29:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:29:42,933 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:43,090 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-02 19:29:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:29:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 19:29:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:43,092 INFO L225 Difference]: With dead ends: 51 [2021-05-02 19:29:43,092 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 19:29:43,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:29:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 19:29:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-05-02 19:29:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:29:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 19:29:43,096 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2021-05-02 19:29:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:43,097 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 19:29:43,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 19:29:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:29:43,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:43,098 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:43,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:43,301 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:43,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2021-05-02 19:29:43,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:43,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389901302] [2021-05-02 19:29:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:43,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:43,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292275209] [2021-05-02 19:29:43,310 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 19:29:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:43,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:29:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:43,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:43,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:43,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389901302] [2021-05-02 19:29:43,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:43,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292275209] [2021-05-02 19:29:43,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292275209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:43,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:43,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:29:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096751122] [2021-05-02 19:29:43,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:29:43,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:29:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:29:43,414 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:43,434 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-02 19:29:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:43,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-02 19:29:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:43,436 INFO L225 Difference]: With dead ends: 46 [2021-05-02 19:29:43,436 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 19:29:43,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 19:29:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 19:29:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:29:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 19:29:43,439 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2021-05-02 19:29:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:43,439 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 19:29:43,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 19:29:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 19:29:43,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:43,440 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] [2021-05-02 19:29:43,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:43,653 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2021-05-02 19:29:43,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:43,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44762134] [2021-05-02 19:29:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:43,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:43,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25768430] [2021-05-02 19:29:43,663 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 19:29:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:29:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:43,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:29:43,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:43,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44762134] [2021-05-02 19:29:43,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:43,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25768430] [2021-05-02 19:29:43,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25768430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:43,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:43,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:29:43,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703138799] [2021-05-02 19:29:43,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:29:43,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:29:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:29:43,904 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:44,091 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-05-02 19:29:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:29:44,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-02 19:29:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:44,092 INFO L225 Difference]: With dead ends: 55 [2021-05-02 19:29:44,092 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 19:29:44,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:29:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 19:29:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-05-02 19:29:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 19:29:44,095 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-05-02 19:29:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:44,096 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 19:29:44,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 19:29:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:29:44,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:44,096 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:44,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:29:44,297 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash 398537738, now seen corresponding path program 2 times [2021-05-02 19:29:44,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:44,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025463014] [2021-05-02 19:29:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:44,305 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:44,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53620195] [2021-05-02 19:29:44,305 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 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 19:29:44,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:29:44,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:29:44,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:29:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:44,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:44,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025463014] [2021-05-02 19:29:44,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53620195] [2021-05-02 19:29:44,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53620195] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:44,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:44,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:29:44,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975807586] [2021-05-02 19:29:44,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:29:44,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:44,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:29:44,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:44,462 INFO L87 Difference]: Start difference. First operand 38 states and 42 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, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:44,488 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-02 19:29:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:44,488 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, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-05-02 19:29:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:44,489 INFO L225 Difference]: With dead ends: 36 [2021-05-02 19:29:44,489 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:29:44,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:29:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:29:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 19:29:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-05-02 19:29:44,491 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2021-05-02 19:29:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:44,491 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-05-02 19:29:44,491 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, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-05-02 19:29:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 19:29:44,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:44,492 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:44,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:44,710 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash -562648499, now seen corresponding path program 1 times [2021-05-02 19:29:44,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:44,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711492136] [2021-05-02 19:29:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:44,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:44,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820047086] [2021-05-02 19:29:44,718 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 19:29:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:44,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 19:29:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:44,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:29:44,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:44,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711492136] [2021-05-02 19:29:44,928 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:44,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820047086] [2021-05-02 19:29:44,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820047086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:44,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:44,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:29:44,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460945057] [2021-05-02 19:29:44,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:29:44,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:29:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:29:44,929 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:45,040 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-05-02 19:29:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:29:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-05-02 19:29:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:45,041 INFO L225 Difference]: With dead ends: 51 [2021-05-02 19:29:45,041 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 19:29:45,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:29:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 19:29:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 19:29:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-05-02 19:29:45,043 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 33 [2021-05-02 19:29:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:45,043 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-05-02 19:29:45,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-05-02 19:29:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 19:29:45,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:45,044 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:45,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:45,260 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1924864334, now seen corresponding path program 1 times [2021-05-02 19:29:45,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:45,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759877097] [2021-05-02 19:29:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:45,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:45,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138105150] [2021-05-02 19:29:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 19:29:45,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 19:29:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 19:29:45,398 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 19:29:45,491 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 19:29:45,491 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 19:29:45,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:29:45,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:45 BasicIcfg [2021-05-02 19:29:45,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:29:45,734 INFO L168 Benchmark]: Toolchain (without parser) took 5067.81 ms. Allocated memory was 196.1 MB in the beginning and 250.6 MB in the end (delta: 54.5 MB). Free memory was 161.7 MB in the beginning and 228.8 MB in the end (delta: -67.1 MB). Peak memory consumption was 130.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:45,734 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 196.1 MB. Free memory is still 178.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:29:45,735 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.09 ms. Allocated memory is still 196.1 MB. Free memory was 161.5 MB in the beginning and 151.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:45,735 INFO L168 Benchmark]: Boogie Preprocessor took 54.77 ms. Allocated memory is still 196.1 MB. Free memory was 151.6 MB in the beginning and 179.9 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:45,735 INFO L168 Benchmark]: RCFGBuilder took 296.54 ms. Allocated memory is still 196.1 MB. Free memory was 179.9 MB in the beginning and 164.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:45,735 INFO L168 Benchmark]: IcfgTransformer took 13.79 ms. Allocated memory is still 196.1 MB. Free memory was 164.1 MB in the beginning and 163.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:45,735 INFO L168 Benchmark]: TraceAbstraction took 4550.45 ms. Allocated memory was 196.1 MB in the beginning and 250.6 MB in the end (delta: 54.5 MB). Free memory was 162.6 MB in the beginning and 228.8 MB in the end (delta: -66.2 MB). Peak memory consumption was 130.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:45,735 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 196.1 MB. Free memory is still 178.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 147.09 ms. Allocated memory is still 196.1 MB. Free memory was 161.5 MB in the beginning and 151.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.77 ms. Allocated memory is still 196.1 MB. Free memory was 151.6 MB in the beginning and 179.9 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 296.54 ms. Allocated memory is still 196.1 MB. Free memory was 179.9 MB in the beginning and 164.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.79 ms. Allocated memory is still 196.1 MB. Free memory was 164.1 MB in the beginning and 163.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4550.45 ms. Allocated memory was 196.1 MB in the beginning and 250.6 MB in the end (delta: 54.5 MB). Free memory was 162.6 MB in the beginning and 228.8 MB in the end (delta: -66.2 MB). Peak memory consumption was 130.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [\old(counter)=16, counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [\old(counter)=0, counter=0, v=-1073741822, x=0, X=2147483644, y=0, Y=536870911] [L31] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, v=-1073741822, x=0, X=2147483644, Y=536870911, y=0] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [\old(counter)=0, counter=1, v=-1073741822, x=0, X=2147483644, x=0, x=0, y=0, Y=536870911] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(counter)=0, counter=1, v=-1073741822, x=0, X=2147483644, x=0, x=0, Y=536870911, y=0] [L35] COND FALSE !(!(x <= X)) VAL [\old(counter)=0, counter=1, v=-1073741822, x=0, x=0, x=0, X=2147483644, y=0, Y=536870911] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [\old(counter)=0, counter=1, v=0, X=2147483644, x=0, x=0, x=0, y=0, Y=536870911] [L45] x++ VAL [\old(counter)=0, counter=1, v=0, x=0, X=2147483644, x=0, x=1, Y=536870911, y=0] [L31] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, v=0, x=0, x=0, X=2147483644, x=1, y=0, Y=536870911] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [\old(counter)=0, counter=2, v=0, x=536870911, x=1, X=2147483644, x=0, y=0, Y=536870911] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(counter)=0, counter=2, v=0, x=0, x=1, x=536870911, X=2147483644, y=0, Y=536870911] [L35] COND FALSE !(!(x <= X)) VAL [\old(counter)=0, counter=2, v=0, x=1, X=2147483644, x=0, x=536870911, y=0, Y=536870911] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [\old(counter)=0, counter=2, v=-3221225466, x=536870911, x=1, X=2147483644, x=0, Y=536870911, y=1] [L45] x++ VAL [\old(counter)=0, counter=2, v=-3221225466, x=536870911, x=2, x=0, X=2147483644, Y=536870911, y=1] [L31] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, v=-3221225466, x=536870911, x=2, X=2147483644, x=0, y=1, Y=536870911] [L31] COND FALSE !(counter++<2) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [\old(counter)=0, counter=3, v=-3221225466, x=1073741822, X=2147483644, x=2, x=2, y=1, Y=536870911] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L14] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L16] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4463.6ms, OverallIterations: 9, TraceHistogramMax: 3, EmptinessCheckTime: 11.0ms, AutomataDifference: 829.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 160 SDtfs, 101 SDslu, 611 SDs, 0 SdLazy, 780 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 370.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 659.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.7ms AutomataMinimizationTime, 8 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 91.7ms SsaConstructionTime, 217.1ms SatisfiabilityAnalysisTime, 1105.4ms InterpolantComputationTime, 218 NumberOfCodeBlocks, 218 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 1066 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1003 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 34/64 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...