/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/geo3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:19,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:19,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:19,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:19,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:19,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:19,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:19,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:19,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:19,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:19,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:19,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:19,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:19,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:19,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:19,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:19,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:19,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:19,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:19,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:19,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:19,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:19,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:19,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:19,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:19,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:19,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:19,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:19,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:19,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:19,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:19,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:19,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:19,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:19,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:19,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:19,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:19,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:19,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:19,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:19,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:19,878 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:19,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:19,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:19,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:19,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:19,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:19,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:19,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:19,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:19,880 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:19,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:20,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:20,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:20,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:20,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:20,158 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:20,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2021-05-02 20:52:20,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07c3d8e0/b8ea1e2379114d05a7dcdde14d7e0dd0/FLAG39049dd02 [2021-05-02 20:52:20,577 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:20,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2021-05-02 20:52:20,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07c3d8e0/b8ea1e2379114d05a7dcdde14d7e0dd0/FLAG39049dd02 [2021-05-02 20:52:20,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07c3d8e0/b8ea1e2379114d05a7dcdde14d7e0dd0 [2021-05-02 20:52:20,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:20,598 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:20,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:20,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:20,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:20,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1812165a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20, skipping insertion in model container [2021-05-02 20:52:20,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:20,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:20,736 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/geo3-ll_valuebound50.c[525,538] [2021-05-02 20:52:20,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:20,775 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:20,819 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/geo3-ll_valuebound50.c[525,538] [2021-05-02 20:52:20,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:20,841 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:20,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20 WrapperNode [2021-05-02 20:52:20,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:20,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:20,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:20,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:20,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (1/1) ... [2021-05-02 20:52:20,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:20,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:20,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:20,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:20,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (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 20:52:20,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:20,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:20,929 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:20,929 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:20,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:20,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:21,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:21,148 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:52:21,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:21 BoogieIcfgContainer [2021-05-02 20:52:21,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:21,149 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:21,150 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:21,150 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:21,152 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:21" (1/1) ... [2021-05-02 20:52:21,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:21 BasicIcfg [2021-05-02 20:52:21,162 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:21,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:21,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:21,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:21,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:20" (1/4) ... [2021-05-02 20:52:21,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155356b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:21, skipping insertion in model container [2021-05-02 20:52:21,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:20" (2/4) ... [2021-05-02 20:52:21,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155356b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:21, skipping insertion in model container [2021-05-02 20:52:21,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:21" (3/4) ... [2021-05-02 20:52:21,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155356b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:21, skipping insertion in model container [2021-05-02 20:52:21,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:21" (4/4) ... [2021-05-02 20:52:21,167 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound50.cJordan [2021-05-02 20:52:21,170 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:21,172 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:21,182 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:21,194 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:21,194 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:21,194 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:21,194 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:21,194 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:21,194 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:21,194 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:21,194 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:52:21,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:21,207 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:21,207 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1338008438, now seen corresponding path program 1 times [2021-05-02 20:52:21,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:21,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690744603] [2021-05-02 20:52:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:21,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:21,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:21,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:21,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 20:52:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:21,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690744603] [2021-05-02 20:52:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690744603] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:21,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:21,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:21,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937925972] [2021-05-02 20:52:21,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:21,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:21,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:21,373 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:21,426 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 20:52:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:21,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:52:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:21,431 INFO L225 Difference]: With dead ends: 31 [2021-05-02 20:52:21,431 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 20:52:21,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 20:52:21,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 20:52:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:52:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 20:52:21,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2021-05-02 20:52:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:21,452 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 20:52:21,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:21,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 20:52:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:52:21,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:21,454 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:21,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:21,454 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1251333530, now seen corresponding path program 1 times [2021-05-02 20:52:21,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:21,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609998065] [2021-05-02 20:52:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:21,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:21,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747154206] [2021-05-02 20:52:21,471 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 20:52:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:21,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:21,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 20:52:21,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:21,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609998065] [2021-05-02 20:52:21,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:21,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747154206] [2021-05-02 20:52:21,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747154206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:21,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:21,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:21,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862700153] [2021-05-02 20:52:21,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:21,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:21,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:21,736 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:21,850 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 20:52:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:52:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:21,855 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:52:21,858 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:21,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:52:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:52:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 20:52:21,871 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-02 20:52:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:21,872 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 20:52:21,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 20:52:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:21,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:21,874 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:22,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:52:22,089 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -284720885, now seen corresponding path program 1 times [2021-05-02 20:52:22,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:22,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158133153] [2021-05-02 20:52:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:22,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:22,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287418059] [2021-05-02 20:52:22,109 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 20:52:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:52:22,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:22,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 20:52:22,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158133153] [2021-05-02 20:52:22,382 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287418059] [2021-05-02 20:52:22,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287418059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:22,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:22,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:22,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771650560] [2021-05-02 20:52:22,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:22,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:22,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:22,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:22,384 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:25,626 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-02 20:52:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:52:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:25,627 INFO L225 Difference]: With dead ends: 41 [2021-05-02 20:52:25,627 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 20:52:25,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 20:52:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 20:52:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 26 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-05-02 20:52:25,631 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2021-05-02 20:52:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:25,632 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-05-02 20:52:25,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-05-02 20:52:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:52:25,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:25,633 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:25,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:25,833 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash 534263172, now seen corresponding path program 1 times [2021-05-02 20:52:25,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:25,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531982294] [2021-05-02 20:52:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:25,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:25,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140798338] [2021-05-02 20:52:25,859 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 20:52:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:26,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:26,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:52:26,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:26,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531982294] [2021-05-02 20:52:26,018 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:26,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140798338] [2021-05-02 20:52:26,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140798338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:26,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:26,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:26,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630654351] [2021-05-02 20:52:26,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:26,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:26,019 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:28,081 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-05-02 20:52:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:28,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-05-02 20:52:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:28,083 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:52:28,083 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:52:28,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:52:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:52:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 20:52:28,089 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 42 [2021-05-02 20:52:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:28,090 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 20:52:28,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 20:52:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:52:28,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:28,091 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:28,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:28,294 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:28,295 INFO L82 PathProgramCache]: Analyzing trace with hash -590068614, now seen corresponding path program 2 times [2021-05-02 20:52:28,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:28,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943754245] [2021-05-02 20:52:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:28,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:28,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761413443] [2021-05-02 20:52:28,312 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 20:52:28,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:28,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:28,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:32,915 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-02 20:52:34,993 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2021-05-02 20:52:35,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:52:35,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943754245] [2021-05-02 20:52:35,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:35,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761413443] [2021-05-02 20:52:35,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761413443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:35,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:35,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:52:35,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436162981] [2021-05-02 20:52:35,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:52:35,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:52:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:52:35,066 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:52:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:43,934 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-05-02 20:52:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:52:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-05-02 20:52:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:43,935 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:52:43,935 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:52:43,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 6490.9ms TimeCoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2021-05-02 20:52:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:52:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:52:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-02 20:52:43,939 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 43 [2021-05-02 20:52:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:43,939 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-02 20:52:43,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:52:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-02 20:52:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:52:43,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:43,940 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:44,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:44,153 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1588029909, now seen corresponding path program 3 times [2021-05-02 20:52:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565399742] [2021-05-02 20:52:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,175 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:44,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044696386] [2021-05-02 20:52:44,176 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 20:52:44,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:52:44,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:52:46,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:46,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565399742] [2021-05-02 20:52:46,668 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:46,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044696386] [2021-05-02 20:52:46,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044696386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:46,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:46,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:52:46,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597899144] [2021-05-02 20:52:46,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:46,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:46,670 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:52,858 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:52:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:54,877 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 20:52:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2021-05-02 20:52:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:54,878 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:52:54,878 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:52:54,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4281.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:52:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:52:54,878 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 20:52:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:52:54,878 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-02 20:52:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:54,878 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:52:54,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:52:54,878 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:52:55,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:52:55,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:55 BasicIcfg [2021-05-02 20:52:55,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:52:55,083 INFO L168 Benchmark]: Toolchain (without parser) took 34485.19 ms. Allocated memory was 168.8 MB in the beginning and 215.0 MB in the end (delta: 46.1 MB). Free memory was 133.5 MB in the beginning and 97.4 MB in the end (delta: 36.0 MB). Peak memory consumption was 82.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:55,084 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 168.8 MB. Free memory is still 150.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:52:55,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.00 ms. Allocated memory is still 168.8 MB. Free memory was 133.3 MB in the beginning and 152.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:55,084 INFO L168 Benchmark]: Boogie Preprocessor took 32.62 ms. Allocated memory is still 168.8 MB. Free memory was 152.3 MB in the beginning and 150.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:55,084 INFO L168 Benchmark]: RCFGBuilder took 273.22 ms. Allocated memory is still 168.8 MB. Free memory was 150.7 MB in the beginning and 136.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:55,084 INFO L168 Benchmark]: IcfgTransformer took 12.79 ms. Allocated memory is still 168.8 MB. Free memory was 136.1 MB in the beginning and 134.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:55,084 INFO L168 Benchmark]: TraceAbstraction took 33919.70 ms. Allocated memory was 168.8 MB in the beginning and 215.0 MB in the end (delta: 46.1 MB). Free memory was 134.0 MB in the beginning and 97.4 MB in the end (delta: 36.5 MB). Peak memory consumption was 83.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:55,085 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 168.8 MB. Free memory is still 150.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.00 ms. Allocated memory is still 168.8 MB. Free memory was 133.3 MB in the beginning and 152.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.62 ms. Allocated memory is still 168.8 MB. Free memory was 152.3 MB in the beginning and 150.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 273.22 ms. Allocated memory is still 168.8 MB. Free memory was 150.7 MB in the beginning and 136.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.79 ms. Allocated memory is still 168.8 MB. Free memory was 136.1 MB in the beginning and 134.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33919.70 ms. Allocated memory was 168.8 MB in the beginning and 215.0 MB in the end (delta: 46.1 MB). Free memory was 134.0 MB in the beginning and 97.4 MB in the end (delta: 36.5 MB). Peak memory consumption was 83.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 33886.8ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 10.3ms, AutomataDifference: 22580.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 138 SDtfs, 90 SDslu, 545 SDs, 0 SdLazy, 395 SolverSat, 30 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 18056.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 220 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 11024.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 44.0ms SsaConstructionTime, 145.4ms SatisfiabilityAnalysisTime, 9704.5ms InterpolantComputationTime, 229 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 223 ConstructedInterpolants, 0 QuantifiedInterpolants, 865 SizeOfPredicates, 14 NumberOfNonLiveVariables, 732 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 104/135 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...