/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:42:09,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:42:09,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:42:09,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:42:09,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:42:09,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:42:09,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:42:09,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:42:09,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:42:09,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:42:09,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:42:09,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:42:09,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:42:09,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:42:09,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:42:09,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:42:09,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:42:09,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:42:09,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:42:09,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:42:09,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:42:09,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:42:09,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:42:09,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:42:09,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:42:09,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:42:09,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:42:09,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:42:09,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:42:09,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:42:09,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:42:09,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:42:09,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:42:09,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:42:09,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:42:09,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:42:09,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:42:09,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:42:09,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:42:09,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:42:09,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:42:09,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:42:09,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:42:09,835 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:42:09,836 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:42:10,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:42:10,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:42:10,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:42:10,096 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:42:10,096 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:42:10,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-05-06 10:42:10,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d467f1e02/380d29e217134344b97ee9f942afb9cd/FLAGc2ab75c9d [2021-05-06 10:42:10,514 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:42:10,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-05-06 10:42:10,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d467f1e02/380d29e217134344b97ee9f942afb9cd/FLAGc2ab75c9d [2021-05-06 10:42:10,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d467f1e02/380d29e217134344b97ee9f942afb9cd [2021-05-06 10:42:10,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:42:10,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:42:10,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:42:10,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:42:10,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:42:10,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a784be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10, skipping insertion in model container [2021-05-06 10:42:10,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:42:10,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:42:10,652 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/ps6-ll_unwindbound2.c[458,471] [2021-05-06 10:42:10,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:42:10,672 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:42:10,679 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/ps6-ll_unwindbound2.c[458,471] [2021-05-06 10:42:10,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:42:10,707 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:42:10,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10 WrapperNode [2021-05-06 10:42:10,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:42:10,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:42:10,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:42:10,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:42:10,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (1/1) ... [2021-05-06 10:42:10,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:42:10,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:42:10,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:42:10,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:42:10,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (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 [2021-05-06 10:42:10,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:42:10,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:42:10,840 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:42:10,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:42:10,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:42:10,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:42:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:42:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:42:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:42:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:42:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:42:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:42:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:42:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:42:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:42:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:42:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:42:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:42:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:42:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:42:11,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:42:11,082 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:42:11,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:11 BoogieIcfgContainer [2021-05-06 10:42:11,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:42:11,084 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:42:11,084 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:42:11,085 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:42:11,086 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:11" (1/1) ... [2021-05-06 10:42:11,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:42:11 BasicIcfg [2021-05-06 10:42:11,130 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:42:11,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:42:11,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:42:11,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:42:11,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:42:10" (1/4) ... [2021-05-06 10:42:11,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc90eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:42:11, skipping insertion in model container [2021-05-06 10:42:11,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:10" (2/4) ... [2021-05-06 10:42:11,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc90eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:42:11, skipping insertion in model container [2021-05-06 10:42:11,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:11" (3/4) ... [2021-05-06 10:42:11,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc90eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:42:11, skipping insertion in model container [2021-05-06 10:42:11,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:42:11" (4/4) ... [2021-05-06 10:42:11,135 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound2.cJordan [2021-05-06 10:42:11,139 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:42:11,142 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:42:11,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:42:11,167 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:42:11,167 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:42:11,167 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:42:11,167 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:42:11,167 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:42:11,167 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:42:11,168 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:42:11,168 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:42:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:42:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:42:11,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:11,181 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:11,182 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:11,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:11,185 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-06 10:42:11,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:11,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125952786] [2021-05-06 10:42:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:11,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:42:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:11,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:42:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:11,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:11,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125952786] [2021-05-06 10:42:11,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125952786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:11,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:11,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:42:11,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019169404] [2021-05-06 10:42:11,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:42:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:42:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:42:11,365 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:11,486 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 10:42:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:42:11,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:42:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:11,492 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:42:11,492 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:42:11,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:42:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:42:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 10:42:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:42:11,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 10:42:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:11,516 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:42:11,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:42:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:42:11,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:11,518 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:11,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:42:11,519 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:11,520 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-06 10:42:11,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:11,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039153565] [2021-05-06 10:42:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:11,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:11,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835204902] [2021-05-06 10:42:11,545 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 [2021-05-06 10:42:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:11,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:42:11,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:11,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:11,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:11,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:11,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:11,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039153565] [2021-05-06 10:42:11,756 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835204902] [2021-05-06 10:42:11,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835204902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:11,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:11,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:42:11,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500376559] [2021-05-06 10:42:11,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:42:11,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:42:11,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:42:11,760 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:42:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:11,768 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:42:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:42:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:42:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:11,769 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:42:11,769 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:42:11,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:42:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:42:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:42:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:42:11,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 10:42:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:11,773 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:42:11,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:42:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:42:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:42:11,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:11,776 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:11,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:42:11,998 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-06 10:42:11,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:11,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386502265] [2021-05-06 10:42:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:12,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:12,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195814387] [2021-05-06 10:42:12,020 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 [2021-05-06 10:42:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:42:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:12,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:12,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:12,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386502265] [2021-05-06 10:42:12,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:12,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195814387] [2021-05-06 10:42:12,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195814387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:12,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:12,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:42:12,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222744829] [2021-05-06 10:42:12,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:42:12,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:12,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:42:12,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:42:12,181 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:12,211 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 10:42:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:42:12,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:42:12,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:12,212 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:42:12,212 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 10:42:12,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 10:42:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 10:42:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:42:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:42:12,217 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:42:12,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:12,217 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:42:12,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:42:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:42:12,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:12,218 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:12,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:12,433 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:12,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-06 10:42:12,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:12,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526290555] [2021-05-06 10:42:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:12,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:12,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921398338] [2021-05-06 10:42:12,447 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 [2021-05-06 10:42:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:42:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:12,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:12,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526290555] [2021-05-06 10:42:12,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:12,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921398338] [2021-05-06 10:42:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921398338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:12,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:12,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:42:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171114762] [2021-05-06 10:42:12,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:42:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:42:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:42:12,601 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:42:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:12,632 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 10:42:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:42:12,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:42:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:12,633 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:42:12,633 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:42:12,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:42:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:42:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:42:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:42:12,637 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:42:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:12,637 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:42:12,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:42:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:42:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:42:12,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:12,638 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:12,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:12,853 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-06 10:42:12,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:12,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72744646] [2021-05-06 10:42:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:12,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:12,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098527829] [2021-05-06 10:42:12,861 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 [2021-05-06 10:42:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:12,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:42:12,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:13,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:13,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72744646] [2021-05-06 10:42:13,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:13,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098527829] [2021-05-06 10:42:13,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098527829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:13,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:13,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:42:13,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115662817] [2021-05-06 10:42:13,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:42:13,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:42:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:13,042 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:42:13,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:13,102 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 10:42:13,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:42:13,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 10:42:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:13,104 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:42:13,105 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:42:13,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:42:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:42:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:42:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-06 10:42:13,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-06 10:42:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:13,124 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-06 10:42:13,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:42:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-06 10:42:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:42:13,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:13,125 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:13,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:13,341 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:13,341 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-06 10:42:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:13,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295410651] [2021-05-06 10:42:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:13,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:13,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228067367] [2021-05-06 10:42:13,349 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 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 [2021-05-06 10:42:13,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 10:42:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:13,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 10:42:13,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:13,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295410651] [2021-05-06 10:42:13,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:13,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228067367] [2021-05-06 10:42:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228067367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:13,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:13,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:42:13,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825322909] [2021-05-06 10:42:13,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:42:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:42:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:42:13,613 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:42:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:13,709 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-06 10:42:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:42:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 10:42:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:13,711 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:42:13,711 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 10:42:13,711 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:42:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 10:42:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-05-06 10:42:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:42:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-06 10:42:13,715 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2021-05-06 10:42:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:13,715 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-06 10:42:13,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:42:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-06 10:42:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:42:13,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:13,716 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:13,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:42:13,921 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:13,922 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-06 10:42:13,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:13,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919600663] [2021-05-06 10:42:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:13,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:13,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61696758] [2021-05-06 10:42:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 10:42:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:42:13,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:14,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:42:14,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:14,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919600663] [2021-05-06 10:42:14,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:14,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61696758] [2021-05-06 10:42:14,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61696758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:14,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:14,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:14,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52076301] [2021-05-06 10:42:14,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:14,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:14,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:14,122 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:42:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:14,172 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-05-06 10:42:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:42:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:14,174 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:42:14,174 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:42:14,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:42:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:42:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:42:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:42:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-05-06 10:42:14,178 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 37 [2021-05-06 10:42:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:14,178 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-05-06 10:42:14,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:42:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-05-06 10:42:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 10:42:14,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:14,179 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:14,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:14,380 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1336575769, now seen corresponding path program 1 times [2021-05-06 10:42:14,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:14,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944472139] [2021-05-06 10:42:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:14,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:14,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345363523] [2021-05-06 10:42:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:42:14,437 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:42:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:42:14,467 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:42:14,528 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 10:42:14,528 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 10:42:14,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:14,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:42:14 BasicIcfg [2021-05-06 10:42:14,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:42:14,756 INFO L168 Benchmark]: Toolchain (without parser) took 4216.64 ms. Allocated memory was 213.9 MB in the beginning and 256.9 MB in the end (delta: 43.0 MB). Free memory was 179.6 MB in the beginning and 231.1 MB in the end (delta: -51.5 MB). Peak memory consumption was 134.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:42:14,756 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 213.9 MB. Free memory is still 196.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:42:14,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.62 ms. Allocated memory is still 213.9 MB. Free memory was 179.4 MB in the beginning and 169.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:42:14,756 INFO L168 Benchmark]: Boogie Preprocessor took 64.62 ms. Allocated memory is still 213.9 MB. Free memory was 169.5 MB in the beginning and 197.2 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:42:14,756 INFO L168 Benchmark]: RCFGBuilder took 308.77 ms. Allocated memory is still 213.9 MB. Free memory was 197.2 MB in the beginning and 182.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:42:14,756 INFO L168 Benchmark]: IcfgTransformer took 46.34 ms. Allocated memory is still 213.9 MB. Free memory was 182.5 MB in the beginning and 180.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:42:14,757 INFO L168 Benchmark]: TraceAbstraction took 3624.48 ms. Allocated memory was 213.9 MB in the beginning and 256.9 MB in the end (delta: 43.0 MB). Free memory was 180.8 MB in the beginning and 231.1 MB in the end (delta: -50.4 MB). Peak memory consumption was 135.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:42:14,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 213.9 MB. Free memory is still 196.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 164.62 ms. Allocated memory is still 213.9 MB. Free memory was 179.4 MB in the beginning and 169.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.62 ms. Allocated memory is still 213.9 MB. Free memory was 169.5 MB in the beginning and 197.2 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 308.77 ms. Allocated memory is still 213.9 MB. Free memory was 197.2 MB in the beginning and 182.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 46.34 ms. Allocated memory is still 213.9 MB. Free memory was 182.5 MB in the beginning and 180.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3624.48 ms. Allocated memory was 213.9 MB in the beginning and 256.9 MB in the end (delta: 43.0 MB). Free memory was 180.8 MB in the beginning and 231.1 MB in the end (delta: -50.4 MB). Peak memory consumption was 135.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=13, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L7] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) VAL [\old(counter)=0, counter=0, k=256] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=256, x=0, y=0] [L28] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=256, x=0, y=0] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=0, counter=1, k=256, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=256, x=1, y=1] [L28] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=256, x=1, y=1] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=1, counter=2, k=256, x=1, y=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=256, x=33, y=2] [L28] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=256, x=33, y=2] [L28] COND FALSE !(counter++<2) [L39] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L39] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=2, counter=3, k=256, x=33, y=2] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3563.5ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 13.4ms, AutomataDifference: 429.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 197 SDtfs, 48 SDslu, 551 SDs, 0 SdLazy, 238 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 263.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 207.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.7ms AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 52.2ms SsaConstructionTime, 236.7ms SatisfiabilityAnalysisTime, 850.4ms InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 587 SizeOfPredicates, 9 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 29/47 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...