/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/prodbin-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:52:24,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:52:24,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:52:24,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:52:24,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:52:24,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:52:24,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:52:24,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:52:24,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:52:24,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:52:24,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:52:24,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:52:24,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:52:24,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:52:24,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:52:24,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:52:24,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:52:24,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:52:24,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:52:24,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:52:24,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:52:24,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:52:24,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:52:24,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:52:24,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:52:24,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:52:24,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:52:24,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:52:24,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:52:24,986 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:52:24,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:52:24,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:52:24,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:52:24,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:52:24,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:52:24,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:52:24,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:52:24,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:52:24,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:52:24,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:52:24,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:52:24,990 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:52:24,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:52:24,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:52:24,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:52:24,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:52:24,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:52:24,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:52:24,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:52:24,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:52:24,991 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:52:24,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:52:25,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:52:25,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:52:25,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:52:25,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:52:25,253 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:52:25,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2021-05-02 21:52:25,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9b6e95a/7c7614ce4d984fa2bd351ceefc4d6038/FLAGefe6a4c4f [2021-05-02 21:52:25,664 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:52:25,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2021-05-02 21:52:25,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9b6e95a/7c7614ce4d984fa2bd351ceefc4d6038/FLAGefe6a4c4f [2021-05-02 21:52:25,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9b6e95a/7c7614ce4d984fa2bd351ceefc4d6038 [2021-05-02 21:52:25,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:52:25,687 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:52:25,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:52:25,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:52:25,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:52:25,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad84c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25, skipping insertion in model container [2021-05-02 21:52:25,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:52:25,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:52:25,821 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/prodbin-ll_unwindbound2.c[537,550] [2021-05-02 21:52:25,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:52:25,837 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:52:25,845 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/prodbin-ll_unwindbound2.c[537,550] [2021-05-02 21:52:25,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:52:25,866 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:52:25,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25 WrapperNode [2021-05-02 21:52:25,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:52:25,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:52:25,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:52:25,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:52:25,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (1/1) ... [2021-05-02 21:52:25,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:52:25,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:52:25,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:52:25,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:52:25,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (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 21:52:25,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:52:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:52:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:52:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:52:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:52:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:52:25,980 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:52:25,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:52:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:52:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:52:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:52:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:52:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:52:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:52:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:52:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:52:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:52:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:52:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:52:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:52:26,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:52:26,199 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:52:26,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:52:26 BoogieIcfgContainer [2021-05-02 21:52:26,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:52:26,200 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:52:26,200 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:52:26,201 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:52:26,202 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:52:26" (1/1) ... [2021-05-02 21:52:26,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:52:26 BasicIcfg [2021-05-02 21:52:26,229 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:52:26,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:52:26,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:52:26,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:52:26,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:52:25" (1/4) ... [2021-05-02 21:52:26,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d4bed8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:52:26, skipping insertion in model container [2021-05-02 21:52:26,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:25" (2/4) ... [2021-05-02 21:52:26,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d4bed8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:52:26, skipping insertion in model container [2021-05-02 21:52:26,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:52:26" (3/4) ... [2021-05-02 21:52:26,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d4bed8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:52:26, skipping insertion in model container [2021-05-02 21:52:26,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:52:26" (4/4) ... [2021-05-02 21:52:26,234 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound2.cJordan [2021-05-02 21:52:26,237 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:52:26,239 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:52:26,258 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:52:26,270 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:52:26,270 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:52:26,270 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:52:26,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:52:26,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:52:26,270 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:52:26,270 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:52:26,270 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:52:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:52:26,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:26,282 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:26,282 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-02 21:52:26,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:26,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914677352] [2021-05-02 21:52:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:26,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:52:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:26,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:52:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:26,424 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 21:52:26,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914677352] [2021-05-02 21:52:26,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914677352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:26,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:26,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:52:26,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487629589] [2021-05-02 21:52:26,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:52:26,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:52:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:52:26,438 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:52:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:26,481 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 21:52:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:52:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 21:52:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:26,487 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:52:26,487 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:52:26,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:52:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:52:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:52:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 21:52:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 21:52:26,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 21:52:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:26,508 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 21:52:26,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:52:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 21:52:26,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:52:26,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:26,509 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:26,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:52:26,509 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:26,510 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-02 21:52:26,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:26,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326584957] [2021-05-02 21:52:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:26,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:26,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569202194] [2021-05-02 21:52:26,523 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 21:52:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:26,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:52:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:26,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:26,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:26,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:26,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:26,719 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 21:52:26,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:26,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326584957] [2021-05-02 21:52:26,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:26,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569202194] [2021-05-02 21:52:26,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569202194] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:26,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:26,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:52:26,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663346733] [2021-05-02 21:52:26,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:52:26,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:26,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:52:26,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:52:26,724 INFO L87 Difference]: Start difference. First operand 25 states and 28 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:52:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:26,738 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 21:52:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:52:26,738 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 21:52:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:26,739 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:52:26,739 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:52:26,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:52:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:52:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:52:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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 21:52:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 21:52:26,742 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 21:52:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:26,743 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 21:52:26,743 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:52:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 21:52:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:52:26,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:26,743 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:26,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:52:26,960 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:26,963 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-02 21:52:26,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:26,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116191023] [2021-05-02 21:52:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:26,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:26,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359703267] [2021-05-02 21:52:26,984 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 21:52:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:52:27,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:27,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,143 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 21:52:27,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:27,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116191023] [2021-05-02 21:52:27,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:27,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359703267] [2021-05-02 21:52:27,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359703267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:27,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:27,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:52:27,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558430787] [2021-05-02 21:52:27,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:52:27,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:52:27,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:52:27,145 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:52:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:27,199 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 21:52:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:52:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 21:52:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:27,200 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:52:27,200 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:52:27,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:52:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:52:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 21:52:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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 21:52:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 21:52:27,204 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 21:52:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:27,204 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 21:52:27,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:52:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 21:52:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:27,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:27,205 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, 1, 1, 1, 1, 1] [2021-05-02 21:52:27,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:27,413 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-02 21:52:27,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:27,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024251129] [2021-05-02 21:52:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:27,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:27,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868575958] [2021-05-02 21:52:27,442 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 21:52:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:52:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:27,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:27,558 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 21:52:27,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:27,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024251129] [2021-05-02 21:52:27,558 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:27,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868575958] [2021-05-02 21:52:27,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868575958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:27,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:27,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:52:27,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672858436] [2021-05-02 21:52:27,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:52:27,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:27,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:52:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:52:27,560 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:27,579 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 21:52:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:52:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 21:52:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:27,579 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:52:27,580 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 21:52:27,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:52:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 21:52:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 21:52:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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 21:52:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 21:52:27,583 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 21:52:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:27,583 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 21:52:27,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 21:52:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:27,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:27,584 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] [2021-05-02 21:52:27,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:27,789 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-02 21:52:27,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:27,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939071893] [2021-05-02 21:52:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:27,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:27,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622365171] [2021-05-02 21:52:27,825 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 21:52:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 21:52:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:28,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:28,267 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 21:52:28,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:28,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939071893] [2021-05-02 21:52:28,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:28,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622365171] [2021-05-02 21:52:28,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622365171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:28,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:28,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:52:28,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806677201] [2021-05-02 21:52:28,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:52:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:52:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:52:28,270 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:32,336 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 21:52:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:52:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:32,338 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:52:32,338 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 21:52:32,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:52:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 21:52:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-02 21:52:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 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 21:52:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 21:52:32,341 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-02 21:52:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:32,342 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 21:52:32,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 21:52:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:32,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:32,342 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] [2021-05-02 21:52:32,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:32,553 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-02 21:52:32,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:32,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481980377] [2021-05-02 21:52:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:32,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:32,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65695036] [2021-05-02 21:52:32,567 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 21:52:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 21:52:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:32,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:32,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481980377] [2021-05-02 21:52:32,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65695036] [2021-05-02 21:52:32,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65695036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:32,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:32,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 21:52:32,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396937745] [2021-05-02 21:52:32,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 21:52:32,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:32,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 21:52:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:52:32,929 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:33,012 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 21:52:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 21:52:33,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:33,015 INFO L225 Difference]: With dead ends: 53 [2021-05-02 21:52:33,015 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 21:52:33,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:52:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 21:52:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 21:52:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:52:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 21:52:33,026 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 21:52:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:33,027 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 21:52:33,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 21:52:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 21:52:33,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:33,034 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] [2021-05-02 21:52:33,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:33,250 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:33,251 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-02 21:52:33,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:33,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124022304] [2021-05-02 21:52:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:33,265 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:33,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103996139] [2021-05-02 21:52:33,266 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 21:52:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:52:33,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:52:33,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:33,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124022304] [2021-05-02 21:52:33,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:33,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103996139] [2021-05-02 21:52:33,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103996139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:33,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:33,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:52:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109641029] [2021-05-02 21:52:33,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:52:33,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:33,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:52:33,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:52:33,482 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:35,654 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-02 21:52:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:52:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 21:52:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:35,655 INFO L225 Difference]: With dead ends: 57 [2021-05-02 21:52:35,655 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 21:52:35,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:52:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 21:52:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 21:52:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 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 21:52:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 21:52:35,658 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 21:52:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:35,658 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 21:52:35,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 21:52:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:52:35,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:35,659 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, 1, 1, 1, 1, 1] [2021-05-02 21:52:35,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:35,860 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash -782932132, now seen corresponding path program 2 times [2021-05-02 21:52:35,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:35,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619919685] [2021-05-02 21:52:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:35,870 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:35,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403190887] [2021-05-02 21:52:35,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:35,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:52:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 21:52:35,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:52:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:52:35,950 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:52:36,000 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 21:52:36,001 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 21:52:36,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:36,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:52:36 BasicIcfg [2021-05-02 21:52:36,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 21:52:36,238 INFO L168 Benchmark]: Toolchain (without parser) took 10551.37 ms. Allocated memory was 194.0 MB in the beginning and 233.8 MB in the end (delta: 39.8 MB). Free memory was 159.7 MB in the beginning and 197.6 MB in the end (delta: -37.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:52:36,238 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 194.0 MB. Free memory was 176.1 MB in the beginning and 176.0 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:52:36,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.98 ms. Allocated memory is still 194.0 MB. Free memory was 159.5 MB in the beginning and 149.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:52:36,238 INFO L168 Benchmark]: Boogie Preprocessor took 60.45 ms. Allocated memory is still 194.0 MB. Free memory was 149.5 MB in the beginning and 177.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-05-02 21:52:36,238 INFO L168 Benchmark]: RCFGBuilder took 270.61 ms. Allocated memory is still 194.0 MB. Free memory was 177.5 MB in the beginning and 162.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 21:52:36,239 INFO L168 Benchmark]: IcfgTransformer took 29.22 ms. Allocated memory is still 194.0 MB. Free memory was 162.8 MB in the beginning and 161.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:52:36,239 INFO L168 Benchmark]: TraceAbstraction took 10007.34 ms. Allocated memory was 194.0 MB in the beginning and 233.8 MB in the end (delta: 39.8 MB). Free memory was 160.7 MB in the beginning and 197.6 MB in the end (delta: -36.9 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2021-05-02 21:52:36,239 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 194.0 MB. Free memory was 176.1 MB in the beginning and 176.0 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 175.98 ms. Allocated memory is still 194.0 MB. Free memory was 159.5 MB in the beginning and 149.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.45 ms. Allocated memory is still 194.0 MB. Free memory was 149.5 MB in the beginning and 177.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 270.61 ms. Allocated memory is still 194.0 MB. Free memory was 177.5 MB in the beginning and 162.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.22 ms. Allocated memory is still 194.0 MB. Free memory was 162.8 MB in the beginning and 161.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10007.34 ms. Allocated memory was 194.0 MB in the beginning and 233.8 MB in the end (delta: 39.8 MB). Free memory was 160.7 MB in the beginning and 197.6 MB in the end (delta: -36.9 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=19, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=1, b=7, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=1, b=7, counter=0, x=1, y=7, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=7, counter=1, counter++=0, x=1, y=7, z=0] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=1, b=7, counter=1, x=1, y=7, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=1, b=7, counter=1, x=1, y=7, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=1, b=7, counter=1, x=1, y=6, z=1] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=1, b=7, counter=1, x=2, y=3, z=1] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=7, counter=2, counter++=1, x=2, y=3, z=1] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=1, b=7, counter=2, x=2, y=3, z=1] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=1, b=7, counter=2, x=2, y=3, z=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=1, b=7, counter=2, x=2, y=2, z=3] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=1, b=7, counter=2, x=4, y=1, z=3] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=7, counter=3, counter++=2, x=4, y=1, z=3] [L33] COND FALSE !(counter++<2) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9940.7ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 10.7ms, AutomataDifference: 6483.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 163 SDtfs, 120 SDslu, 576 SDs, 0 SdLazy, 521 SolverSat, 28 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6181.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 457.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=6, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.5ms SsaConstructionTime, 263.5ms SatisfiabilityAnalysisTime, 1074.3ms InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 742 SizeOfPredicates, 15 NumberOfNonLiveVariables, 814 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 12/26 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...