/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/geo1-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:50:31,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:50:31,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:50:31,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:50:31,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:50:31,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:50:31,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:50:31,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:50:31,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:50:31,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:50:31,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:50:31,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:50:31,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:50:31,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:50:31,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:50:31,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:50:31,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:50:31,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:50:31,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:50:31,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:50:31,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:50:31,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:50:31,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:50:31,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:50:31,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:50:31,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:50:31,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:50:31,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:50:31,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:50:31,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:50:31,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:50:31,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:50:31,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:50:31,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:50:31,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:50:31,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:50:31,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:50:31,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:50:31,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:50:31,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:50:31,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:50:31,236 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:50:31,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:50:31,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:50:31,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:50:31,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:50:31,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:50:31,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:50:31,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:50:31,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:50:31,237 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:50:31,238 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:50:31,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:50:31,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:50:31,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:50:31,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:50:31,547 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:50:31,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound50.c [2021-05-02 20:50:31,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd527bc73/d722c56da6ba4c7d8b689c53c018d7d5/FLAG65445679e [2021-05-02 20:50:32,007 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:50:32,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound50.c [2021-05-02 20:50:32,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd527bc73/d722c56da6ba4c7d8b689c53c018d7d5/FLAG65445679e [2021-05-02 20:50:32,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd527bc73/d722c56da6ba4c7d8b689c53c018d7d5 [2021-05-02 20:50:32,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:50:32,443 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:50:32,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:50:32,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:50:32,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:50:32,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306a1bf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32, skipping insertion in model container [2021-05-02 20:50:32,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:50:32,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:50:32,582 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/geo1-ll_valuebound50.c[546,559] [2021-05-02 20:50:32,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:50:32,600 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:50:32,610 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/geo1-ll_valuebound50.c[546,559] [2021-05-02 20:50:32,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:50:32,640 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:50:32,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32 WrapperNode [2021-05-02 20:50:32,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:50:32,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:50:32,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:50:32,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:50:32,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... [2021-05-02 20:50:32,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:50:32,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:50:32,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:50:32,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:50:32,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:50:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:50:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:50:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:50:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:50:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:50:32,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:50:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:50:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:50:32,796 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:50:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:50:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:50:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:50:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:50:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:50:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:50:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:50:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:50:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:50:32,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:50:32,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:50:33,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:50:33,033 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:50:33,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:33 BoogieIcfgContainer [2021-05-02 20:50:33,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:50:33,035 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:50:33,035 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:50:33,036 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:50:33,038 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:33" (1/1) ... [2021-05-02 20:50:33,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:50:33 BasicIcfg [2021-05-02 20:50:33,052 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:50:33,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:50:33,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:50:33,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:50:33,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:50:32" (1/4) ... [2021-05-02 20:50:33,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb62160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:50:33, skipping insertion in model container [2021-05-02 20:50:33,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:32" (2/4) ... [2021-05-02 20:50:33,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb62160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:50:33, skipping insertion in model container [2021-05-02 20:50:33,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:33" (3/4) ... [2021-05-02 20:50:33,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb62160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:50:33, skipping insertion in model container [2021-05-02 20:50:33,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:50:33" (4/4) ... [2021-05-02 20:50:33,058 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound50.cJordan [2021-05-02 20:50:33,062 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:50:33,065 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:50:33,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:50:33,094 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:50:33,094 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:50:33,094 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:50:33,094 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:50:33,095 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:50:33,095 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:50:33,095 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:50:33,095 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:50:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:50:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:50:33,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:33,111 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:33,112 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1950279688, now seen corresponding path program 1 times [2021-05-02 20:50:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:33,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864476805] [2021-05-02 20:50:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:33,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:50:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:33,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:50:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:33,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:50:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:33,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:50:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:33,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:50:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:50:33,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:33,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864476805] [2021-05-02 20:50:33,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864476805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:50:33,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:50:33,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:50:33,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930155724] [2021-05-02 20:50:33,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:50:33,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:33,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:50:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:50:33,432 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:50:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:33,500 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 20:50:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:50:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:50:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:33,510 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:50:33,510 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:50:33,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:50:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:50:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:50:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:50:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 20:50:33,544 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2021-05-02 20:50:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:33,545 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 20:50:33,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:50:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 20:50:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:50:33,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:33,548 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:33,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:50:33,548 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1010552682, now seen corresponding path program 1 times [2021-05-02 20:50:33,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:33,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577362688] [2021-05-02 20:50:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:33,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:33,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198066836] [2021-05-02 20:50:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:50:33,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:33,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:50:33,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:33,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577362688] [2021-05-02 20:50:33,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:33,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198066836] [2021-05-02 20:50:33,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198066836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:33,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:33,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:50:33,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968565680] [2021-05-02 20:50:33,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:50:33,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:50:33,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:50:33,962 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:50:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:34,068 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 20:50:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:50:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:50:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:34,070 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:50:34,070 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:50:34,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:50:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 20:50:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:50:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 20:50:34,076 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2021-05-02 20:50:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:34,077 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 20:50:34,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:50:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 20:50:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:50:34,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:34,079 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:34,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:50:34,293 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1070211269, now seen corresponding path program 1 times [2021-05-02 20:50:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:34,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491575251] [2021-05-02 20:50:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:34,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:34,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457963913] [2021-05-02 20:50:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:34,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:50:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:34,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:50:34,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:34,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491575251] [2021-05-02 20:50:34,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:34,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457963913] [2021-05-02 20:50:34,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457963913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:34,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:34,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:50:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830250534] [2021-05-02 20:50:34,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:50:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:50:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:50:34,629 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:50:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:36,799 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-05-02 20:50:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:50:36,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-05-02 20:50:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:36,801 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:50:36,801 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 20:50:36,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:50:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 20:50:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 20:50:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:50:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 20:50:36,806 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 40 [2021-05-02 20:50:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:36,807 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 20:50:36,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:50:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 20:50:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:50:36,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:36,808 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:37,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:37,025 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:37,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1097887108, now seen corresponding path program 1 times [2021-05-02 20:50:37,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:37,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668962383] [2021-05-02 20:50:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:37,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:37,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626200138] [2021-05-02 20:50:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:37,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:50:37,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:37,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:50:37,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:37,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668962383] [2021-05-02 20:50:37,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:37,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626200138] [2021-05-02 20:50:37,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626200138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:37,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:37,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:50:37,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978394549] [2021-05-02 20:50:37,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:50:37,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:50:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:50:37,230 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:50:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:37,318 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 20:50:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:50:37,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-05-02 20:50:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:37,320 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:50:37,320 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:50:37,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:50:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:50:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 20:50:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:50:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 20:50:37,325 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 40 [2021-05-02 20:50:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:37,326 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 20:50:37,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:50:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 20:50:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:50:37,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:37,327 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:37,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:37,550 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:37,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1078763050, now seen corresponding path program 2 times [2021-05-02 20:50:37,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:37,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211317051] [2021-05-02 20:50:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:37,564 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:37,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636768206] [2021-05-02 20:50:37,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:37,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:50:37,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:37,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:50:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:37,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:37,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:43,905 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 20:50:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:43,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:43,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:43,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:50:43,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:43,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211317051] [2021-05-02 20:50:43,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:43,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636768206] [2021-05-02 20:50:43,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636768206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:43,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:43,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:50:43,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171467022] [2021-05-02 20:50:43,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:50:43,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:50:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:50:43,986 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:51:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:00,192 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-05-02 20:51:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:51:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 20:51:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:00,194 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:51:00,194 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:51:00,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6251.3ms TimeCoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2021-05-02 20:51:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:51:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:51:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:51:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-02 20:51:00,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 47 [2021-05-02 20:51:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:00,199 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-02 20:51:00,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:51:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-02 20:51:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:51:00,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:00,201 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:00,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:00,401 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1503820092, now seen corresponding path program 3 times [2021-05-02 20:51:00,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:00,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627025155] [2021-05-02 20:51:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:00,412 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:00,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826578605] [2021-05-02 20:51:00,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:00,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:51:00,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:00,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:51:00,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:00,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:02,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:02,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:02,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:51:02,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627025155] [2021-05-02 20:51:02,743 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826578605] [2021-05-02 20:51:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826578605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:02,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:02,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:51:02,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371011530] [2021-05-02 20:51:02,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:51:02,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:51:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=72, Unknown=1, NotChecked=0, Total=90 [2021-05-02 20:51:02,745 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:51:15,090 WARN L205 SmtUtils]: Spent 10.24 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-02 20:51:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:17,254 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 20:51:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:51:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-05-02 20:51:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:17,255 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:51:17,255 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:51:17,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 14458.7ms TimeCoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2021-05-02 20:51:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:51:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:51:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:51:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:51:17,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-02 20:51:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:17,256 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:51:17,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:51:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:51:17,257 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:51:17,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:51:17,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:51:17 BasicIcfg [2021-05-02 20:51:17,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:51:17,461 INFO L168 Benchmark]: Toolchain (without parser) took 45018.32 ms. Allocated memory is still 200.3 MB. Free memory was 165.3 MB in the beginning and 142.6 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:51:17,461 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 200.3 MB. Free memory is still 181.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:51:17,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.99 ms. Allocated memory is still 200.3 MB. Free memory was 165.1 MB in the beginning and 155.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:51:17,461 INFO L168 Benchmark]: Boogie Preprocessor took 74.96 ms. Allocated memory is still 200.3 MB. Free memory was 155.4 MB in the beginning and 183.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:51:17,462 INFO L168 Benchmark]: RCFGBuilder took 316.47 ms. Allocated memory is still 200.3 MB. Free memory was 183.1 MB in the beginning and 167.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:51:17,462 INFO L168 Benchmark]: IcfgTransformer took 16.82 ms. Allocated memory is still 200.3 MB. Free memory was 167.9 MB in the beginning and 166.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:51:17,462 INFO L168 Benchmark]: TraceAbstraction took 44407.55 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 142.6 MB in the end (delta: 23.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:51:17,462 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 200.3 MB. Free memory is still 181.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.99 ms. Allocated memory is still 200.3 MB. Free memory was 165.1 MB in the beginning and 155.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.96 ms. Allocated memory is still 200.3 MB. Free memory was 155.4 MB in the beginning and 183.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 316.47 ms. Allocated memory is still 200.3 MB. Free memory was 183.1 MB in the beginning and 167.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.82 ms. Allocated memory is still 200.3 MB. Free memory was 167.9 MB in the beginning and 166.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 44407.55 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 142.6 MB in the end (delta: 23.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 44365.6ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 14.6ms, AutomataDifference: 33186.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 96 SDslu, 602 SDs, 0 SdLazy, 534 SolverSat, 33 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 20345.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 20995.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 39.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 86.2ms SsaConstructionTime, 204.4ms SatisfiabilityAnalysisTime, 9376.7ms InterpolantComputationTime, 247 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 241 ConstructedInterpolants, 1 QuantifiedInterpolants, 779 SizeOfPredicates, 18 NumberOfNonLiveVariables, 723 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 168/198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...