/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:23:33,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:23:33,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:23:33,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:23:33,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:23:33,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:23:33,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:23:33,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:23:33,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:23:33,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:23:33,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:23:33,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:23:33,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:23:33,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:23:33,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:23:33,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:23:33,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:23:33,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:23:33,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:23:33,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:23:33,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:23:33,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:23:33,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:23:33,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:23:33,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:23:33,879 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:23:33,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:23:33,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:23:33,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:23:33,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:23:33,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:23:33,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:23:33,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:23:33,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:23:33,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:23:34,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:23:34,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:23:34,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:23:34,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:23:34,148 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:23:34,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2021-05-02 15:23:34,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d367df2/0fde7fe3eec7471294a915f427e48b2f/FLAGe357c1028 [2021-05-02 15:23:34,558 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:23:34,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2021-05-02 15:23:34,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d367df2/0fde7fe3eec7471294a915f427e48b2f/FLAGe357c1028 [2021-05-02 15:23:34,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d367df2/0fde7fe3eec7471294a915f427e48b2f [2021-05-02 15:23:34,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:23:34,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:23:34,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:34,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:23:34,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:23:34,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@721a9e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34, skipping insertion in model container [2021-05-02 15:23:34,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:23:34,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:23:34,671 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_unwindbound5.c[525,538] [2021-05-02 15:23:34,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:34,684 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:23:34,691 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_unwindbound5.c[525,538] [2021-05-02 15:23:34,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:34,707 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:23:34,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34 WrapperNode [2021-05-02 15:23:34,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:34,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:23:34,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:23:34,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:23:34,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:23:34,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:23:34,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:23:34,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:23:34,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (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 15:23:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:23:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:23:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:23:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:23:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:23:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:23:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:23:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:23:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:23:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:23:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:23:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:23:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:23:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:23:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:23:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:23:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:23:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:23:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:23:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:23:35,053 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:23:35,053 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:23:35,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:35 BoogieIcfgContainer [2021-05-02 15:23:35,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:23:35,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:23:35,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:23:35,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:23:35,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:23:34" (1/3) ... [2021-05-02 15:23:35,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68774754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:35, skipping insertion in model container [2021-05-02 15:23:35,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (2/3) ... [2021-05-02 15:23:35,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68774754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:35, skipping insertion in model container [2021-05-02 15:23:35,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:35" (3/3) ... [2021-05-02 15:23:35,059 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound5.c [2021-05-02 15:23:35,079 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:23:35,082 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:23:35,092 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:23:35,118 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:23:35,119 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:23:35,119 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:23:35,119 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:23:35,119 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:23:35,119 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:23:35,119 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:23:35,119 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:23:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 15:23:35,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:35,148 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:35,149 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 15:23:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:35,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902397232] [2021-05-02 15:23:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:35,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:35,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166587501] [2021-05-02 15:23:35,234 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 15:23:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:23:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:35,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:35,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902397232] [2021-05-02 15:23:35,321 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:35,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166587501] [2021-05-02 15:23:35,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166587501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:35,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:35,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:23:35,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533893251] [2021-05-02 15:23:35,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:23:35,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:23:35,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:23:35,334 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:35,344 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 15:23:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:23:35,345 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 15:23:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:35,349 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:23:35,350 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 15:23:35,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:23:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 15:23:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 15:23:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 15:23:35,371 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 15:23:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:35,371 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 15:23:35,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 15:23:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:35,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:35,372 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:35,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:23:35,577 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 15:23:35,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:35,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487520777] [2021-05-02 15:23:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:35,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:35,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097983871] [2021-05-02 15:23:35,591 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 15:23:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:23:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:35,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:35,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:35,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487520777] [2021-05-02 15:23:35,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:35,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097983871] [2021-05-02 15:23:35,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097983871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:35,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:35,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:23:35,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386079887] [2021-05-02 15:23:35,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:23:35,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:35,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:23:35,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:35,697 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:35,706 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 15:23:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:23:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:23:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:35,706 INFO L225 Difference]: With dead ends: 26 [2021-05-02 15:23:35,706 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 15:23:35,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 15:23:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 15:23:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 15:23:35,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 15:23:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:35,710 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 15:23:35,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 15:23:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:35,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:35,711 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:35,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:35,913 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 15:23:35,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:35,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640070695] [2021-05-02 15:23:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:35,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:35,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701038683] [2021-05-02 15:23:35,931 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 15:23:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:35,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 15:23:35,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:36,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:36,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640070695] [2021-05-02 15:23:36,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701038683] [2021-05-02 15:23:36,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701038683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:36,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:36,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:23:36,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911887472] [2021-05-02 15:23:36,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:36,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:36,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:36,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:36,080 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:36,103 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 15:23:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:23:36,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:23:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:36,104 INFO L225 Difference]: With dead ends: 28 [2021-05-02 15:23:36,104 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:23:36,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:23:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:23:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 15:23:36,108 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 15:23:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:36,108 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 15:23:36,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 15:23:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:36,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:36,109 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:36,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,326 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 15:23:36,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:36,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217679883] [2021-05-02 15:23:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:36,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:36,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050047643] [2021-05-02 15:23:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:36,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:23:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:36,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:36,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217679883] [2021-05-02 15:23:36,431 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:36,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050047643] [2021-05-02 15:23:36,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050047643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:36,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:36,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:23:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383551093] [2021-05-02 15:23:36,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:36,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:36,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:36,433 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:36,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:36,453 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 15:23:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:23:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:23:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:36,454 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:23:36,454 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:23:36,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:23:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:23:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 15:23:36,458 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 15:23:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:36,458 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 15:23:36,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 15:23:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:36,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:36,458 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:36,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,673 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 15:23:36,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:36,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535873527] [2021-05-02 15:23:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:36,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:36,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901585676] [2021-05-02 15:23:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:23:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:36,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:36,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:36,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535873527] [2021-05-02 15:23:36,816 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:36,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901585676] [2021-05-02 15:23:36,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901585676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:36,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:36,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:23:36,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858181114] [2021-05-02 15:23:36,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:23:36,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:36,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:23:36,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:36,817 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:42,924 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 15:23:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:42,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:23:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:42,925 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:23:42,926 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:23:42,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:23:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:23:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 15:23:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 15:23:42,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2021-05-02 15:23:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:42,930 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 15:23:42,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 15:23:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 15:23:42,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:42,931 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:43,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:43,141 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash -475222577, now seen corresponding path program 1 times [2021-05-02 15:23:43,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:43,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435362084] [2021-05-02 15:23:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:43,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:43,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522271923] [2021-05-02 15:23:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:43,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:23:43,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:43,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:43,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:23:43,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:43,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435362084] [2021-05-02 15:23:43,290 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:43,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522271923] [2021-05-02 15:23:43,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522271923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:43,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:43,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:23:43,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873269572] [2021-05-02 15:23:43,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:23:43,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:43,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:23:43,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:23:43,293 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:23:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:45,357 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-05-02 15:23:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:23:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-05-02 15:23:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:45,359 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:23:45,359 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:23:45,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:23:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:23:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 15:23:45,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-05-02 15:23:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:45,364 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 15:23:45,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:23:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 15:23:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:45,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:45,365 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:45,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:45,575 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:45,575 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 15:23:45,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:45,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087205709] [2021-05-02 15:23:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:45,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:45,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255920893] [2021-05-02 15:23:45,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:45,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:45,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:45,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:23:45,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:45,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:45,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:45,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087205709] [2021-05-02 15:23:45,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:45,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255920893] [2021-05-02 15:23:45,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255920893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:45,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:45,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:23:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639647421] [2021-05-02 15:23:45,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:23:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:23:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:45,714 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:45,745 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 15:23:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:23:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:45,751 INFO L225 Difference]: With dead ends: 42 [2021-05-02 15:23:45,751 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:23:45,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:23:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:23:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:23:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 15:23:45,762 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2021-05-02 15:23:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:45,762 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 15:23:45,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 15:23:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:45,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:45,763 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:45,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:45,973 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:45,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:45,974 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 15:23:45,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:45,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137097970] [2021-05-02 15:23:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:45,980 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:45,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121810228] [2021-05-02 15:23:45,980 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:46,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:46,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:23:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:52,315 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 15:23:54,359 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 15:23:54,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:54,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:23:54,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:54,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137097970] [2021-05-02 15:23:54,395 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:54,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121810228] [2021-05-02 15:23:54,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121810228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:54,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:54,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:23:54,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777975532] [2021-05-02 15:23:54,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:23:54,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:54,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:23:54,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:23:54,396 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:24:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:24:07,071 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-05-02 15:24:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:24:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:24:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:24:07,072 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:24:07,072 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 15:24:07,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8276.1ms TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2021-05-02 15:24:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 15:24:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 15:24:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:24:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 15:24:07,079 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 28 [2021-05-02 15:24:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:24:07,079 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 15:24:07,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:24:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 15:24:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:24:07,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:24:07,080 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:24:07,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:24:07,281 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:24:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:24:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-02 15:24:07,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:24:07,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526172285] [2021-05-02 15:24:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:24:07,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:24:07,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867752933] [2021-05-02 15:24:07,295 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:24:07,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:24:07,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:24:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:24:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:09,782 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 15:24:09,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:11,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:11,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:11,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:11,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:11,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:11,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:13,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:13,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:13,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:13,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:13,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,388 WARN L205 SmtUtils]: Spent 10.24 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:24:26,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:41,308 WARN L205 SmtUtils]: Spent 8.48 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:24:41,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:41,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:45,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:45,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:45,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:45,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:45,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:47,593 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 15:24:49,609 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from true [2021-05-02 15:24:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:24:49,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:49,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526172285] [2021-05-02 15:24:49,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:49,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867752933] [2021-05-02 15:24:49,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867752933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:49,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:49,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:24:49,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538372210] [2021-05-02 15:24:49,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:24:49,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:24:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=5, NotChecked=14, Total=90 [2021-05-02 15:24:49,611 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:24:53,778 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 15:25:02,704 WARN L205 SmtUtils]: Spent 8.92 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 15:25:32,446 WARN L205 SmtUtils]: Spent 14.85 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 15:26:56,878 WARN L205 SmtUtils]: Spent 1.13 m on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 15:26:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:26:58,881 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 15:26:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:26:58,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:26:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:26:58,942 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:26:58,942 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 15:26:58,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 135739.3ms TimeCoverageRelationStatistics Valid=46, Invalid=129, Unknown=11, NotChecked=24, Total=210 [2021-05-02 15:26:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 15:26:58,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 15:26:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:26:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 15:26:58,946 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 15:26:58,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:26:58,946 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 15:26:58,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:26:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 15:26:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:26:58,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:26:58,947 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:26:59,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:26:59,150 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:26:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:26:59,151 INFO L82 PathProgramCache]: Analyzing trace with hash 620230300, now seen corresponding path program 3 times [2021-05-02 15:26:59,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:26:59,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631615456] [2021-05-02 15:26:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:26:59,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:26:59,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691367835] [2021-05-02 15:26:59,159 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:26:59,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:26:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:26:59,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:26:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:03,555 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:27:03,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:05,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:16,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:16,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:16,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:16,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:16,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:18,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,151 WARN L205 SmtUtils]: Spent 10.47 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 15:27:32,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:34,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:34,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:34,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:34,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:34,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:36,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,508 WARN L205 SmtUtils]: Spent 10.11 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 15:27:51,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:55,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:57,685 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 15:27:59,694 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 15:27:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:27:59,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631615456] [2021-05-02 15:27:59,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691367835] [2021-05-02 15:27:59,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691367835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:59,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:59,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:27:59,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031548610] [2021-05-02 15:27:59,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:27:59,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:59,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:27:59,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=50, Unknown=7, NotChecked=14, Total=90 [2021-05-02 15:27:59,696 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:28:07,989 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 45 DAG size of output: 6 [2021-05-02 15:28:20,757 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse1 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse3 (div .cse1 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse2 (* v_main_~z~0_BEFORE_CALL_14 .cse3)) (.cse4 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse2 (* .cse3 (- 1))) .cse4) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse2 (* (- 1) .cse3)) .cse4) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse4 0))))))))) (and (or (and (= |c___VERIFIER_assert_#in~cond| 0) .cse0) (= |c___VERIFIER_assert_#in~cond| 1)) (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) .cse0)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond))) is different from false [2021-05-02 15:28:49,307 WARN L205 SmtUtils]: Spent 24.46 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 15:28:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:51,368 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 15:28:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:28:51,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:28:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:51,370 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:28:51,370 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:28:51,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 74443.2ms TimeCoverageRelationStatistics Valid=37, Invalid=92, Unknown=11, NotChecked=42, Total=182 [2021-05-02 15:28:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:28:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:28:51,371 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 15:28:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:28:51,371 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 15:28:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:51,371 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:28:51,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:28:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:28:51,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:28:51,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:28:51,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:29:17,323 WARN L205 SmtUtils]: Spent 25.69 s on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-05-02 15:29:33,634 WARN L205 SmtUtils]: Spent 16.31 s on a formula simplification. DAG size of input: 92 DAG size of output: 1 [2021-05-02 15:30:09,137 WARN L205 SmtUtils]: Spent 35.50 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-02 15:30:12,989 WARN L205 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-05-02 15:30:12,992 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:30:12,993 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:30:12,993 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse1 (= (* main_~z~0 main_~a~0) main_~az~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~y~0 1) (<= ~counter~0 0) .cse1) (let ((.cse3 (= main_~z~0 0))) (let ((.cse8 (and .cse0 .cse3))) (and .cse1 (or (let ((.cse2 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (= (mod .cse2 main_~z~0) 0) (not .cse3) (let ((.cse4 (div .cse2 main_~z~0))) (let ((.cse6 (= main_~az~0 0)) (.cse5 (* main_~z~0 .cse4))) (or (and (= .cse4 (+ .cse5 main_~a~0)) .cse6) (let ((.cse7 (+ .cse5 (* .cse4 (- 1)) main_~a~0))) (and (not .cse6) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0) (= (mod .cse7 main_~az~0) 0)))))))) .cse8) (or .cse8 (= (mod main_~y~0 main_~z~0) 0))))))) [2021-05-02 15:30:12,994 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 43) the Hoare annotation is: (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (= (* main_~z~0 main_~a~0) main_~az~0) (not (= main_~z~0 0)) (= (mod main_~y~0 main_~z~0) 0))) (not (<= |old(~counter~0)| 0)) (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0)))) [2021-05-02 15:30:12,994 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 22 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (<= ~counter~0 0)) [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point L44(line 44) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse6 (= main_~a~0 main_~x~0)) (.cse0 (= (* main_~z~0 main_~a~0) main_~az~0))) (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (let ((.cse4 (= main_~z~0 0)) (.cse3 (div .cse1 main_~z~0))) (let ((.cse2 (* main_~z~0 .cse3)) (.cse5 (and .cse6 .cse4))) (and .cse0 (or (and (= (mod .cse1 main_~z~0) 0) (or (= main_~az~0 0) (= (mod (+ .cse2 (* .cse3 (- 1)) main_~a~0) main_~az~0) 0)) (not .cse4)) .cse5) (or (and (= (+ .cse2 main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse3)) (= (mod main_~y~0 main_~z~0) 0)) .cse5))))) (not (<= |old(~counter~0)| 0)) (and (<= ~counter~0 1) .cse6 (= main_~y~0 1) .cse0))) [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:30:12,994 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:30:13,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:30:13 BoogieIcfgContainer [2021-05-02 15:30:13,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:30:13,008 INFO L168 Benchmark]: Toolchain (without parser) took 398435.61 ms. Allocated memory was 187.7 MB in the beginning and 226.5 MB in the end (delta: 38.8 MB). Free memory was 152.5 MB in the beginning and 165.0 MB in the end (delta: -12.5 MB). Peak memory consumption was 114.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:13,008 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:30:13,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.28 ms. Allocated memory is still 187.7 MB. Free memory was 152.3 MB in the beginning and 142.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:13,008 INFO L168 Benchmark]: Boogie Preprocessor took 55.30 ms. Allocated memory is still 187.7 MB. Free memory was 142.6 MB in the beginning and 171.0 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:13,008 INFO L168 Benchmark]: RCFGBuilder took 290.53 ms. Allocated memory is still 187.7 MB. Free memory was 170.5 MB in the beginning and 155.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:13,008 INFO L168 Benchmark]: TraceAbstraction took 397952.30 ms. Allocated memory was 187.7 MB in the beginning and 226.5 MB in the end (delta: 38.8 MB). Free memory was 155.3 MB in the beginning and 165.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 117.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:13,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 134.28 ms. Allocated memory is still 187.7 MB. Free memory was 152.3 MB in the beginning and 142.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.30 ms. Allocated memory is still 187.7 MB. Free memory was 142.6 MB in the beginning and 171.0 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 290.53 ms. Allocated memory is still 187.7 MB. Free memory was 170.5 MB in the beginning and 155.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 397952.30 ms. Allocated memory was 187.7 MB in the beginning and 226.5 MB in the end (delta: 38.8 MB). Free memory was 155.3 MB in the beginning and 165.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 117.2 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 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 316455.4ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 15.7ms, AutomataDifference: 201980.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 81419.4ms, InitialAbstractionConstructionTime: 17.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 172 SDtfs, 76 SDslu, 597 SDs, 0 SdLazy, 307 SolverSat, 21 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 58328.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 218617.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=8, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.3ms AutomataMinimizationTime, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 30 NumberOfFragments, 334 HoareAnnotationTreeSize, 19 FomulaSimplifications, 285 FormulaSimplificationTreeSizeReduction, 47.1ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 1228 FormulaSimplificationTreeSizeReductionInter, 81363.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 73.6ms SsaConstructionTime, 355.2ms SatisfiabilityAnalysisTime, 111450.7ms InterpolantComputationTime, 229 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 219 ConstructedInterpolants, 6 QuantifiedInterpolants, 1766 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1345 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 97/130 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 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (!(\old(counter) <= 0) || (((a == x && y == 1) && counter <= 0) && z * a == az)) || ((z * a == az && ((((x + a * -1) % z == 0 && !(z == 0)) && (((x + a * -1) / z == z * ((x + a * -1) / z) + a && az == 0) || ((!(az == 0) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) / az * z == y) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) % az == 0))) || (a == x && z == 0))) && ((a == x && z == 0) || y % z == 0)) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...