/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/egcd-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:17:37,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:17:37,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:17:38,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:17:38,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:17:38,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:17:38,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:17:38,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:17:38,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:17:38,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:17:38,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:17:38,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:17:38,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:17:38,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:17:38,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:17:38,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:17:38,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:17:38,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:17:38,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:17:38,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:17:38,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:17:38,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:17:38,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:17:38,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:17:38,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:17:38,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:17:38,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:17:38,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:17:38,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:17:38,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:17:38,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:17:38,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:17:38,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:17:38,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:17:38,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:17:38,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:17:38,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:17:38,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:17:38,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:17:38,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:17:38,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:17:38,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:17:38,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:17:38,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:17:38,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:17:38,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:17:38,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:17:38,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:17:38,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:17:38,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:17:38,101 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:17:38,101 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:17:38,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:17:38,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:17:38,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:17:38,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:17:38,355 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:17:38,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-02 20:17:38,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd6b5151/8b78c460d0a949cc87cbc46af035f922/FLAGa3e17b0d0 [2021-05-02 20:17:38,795 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:17:38,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-02 20:17:38,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd6b5151/8b78c460d0a949cc87cbc46af035f922/FLAGa3e17b0d0 [2021-05-02 20:17:39,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd6b5151/8b78c460d0a949cc87cbc46af035f922 [2021-05-02 20:17:39,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:17:39,200 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:17:39,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:17:39,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:17:39,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:17:39,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@129012df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39, skipping insertion in model container [2021-05-02 20:17:39,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:17:39,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:17:39,313 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/egcd-ll_unwindbound2.c[489,502] [2021-05-02 20:17:39,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:17:39,330 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:17:39,355 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/egcd-ll_unwindbound2.c[489,502] [2021-05-02 20:17:39,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:17:39,378 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:17:39,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39 WrapperNode [2021-05-02 20:17:39,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:17:39,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:17:39,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:17:39,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:17:39,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:17:39,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:17:39,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:17:39,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:17:39,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:17:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:17:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:17:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:17:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:17:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:17:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:17:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:17:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:17:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:17:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:17:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:17:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:17:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:17:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:17:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:17:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:17:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:17:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:17:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:17:39,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:17:39,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:17:39,588 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:17:39,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:17:39 BoogieIcfgContainer [2021-05-02 20:17:39,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:17:39,589 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:17:39,589 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:17:39,590 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:17:39,592 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:17:39" (1/1) ... [2021-05-02 20:17:39,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:17:39 BasicIcfg [2021-05-02 20:17:39,603 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:17:39,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:17:39,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:17:39,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:17:39,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:17:39" (1/4) ... [2021-05-02 20:17:39,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fa82b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:17:39, skipping insertion in model container [2021-05-02 20:17:39,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:17:39" (2/4) ... [2021-05-02 20:17:39,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fa82b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:17:39, skipping insertion in model container [2021-05-02 20:17:39,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:17:39" (3/4) ... [2021-05-02 20:17:39,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fa82b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:17:39, skipping insertion in model container [2021-05-02 20:17:39,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:17:39" (4/4) ... [2021-05-02 20:17:39,608 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.cJordan [2021-05-02 20:17:39,611 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:17:39,613 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:17:39,623 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:17:39,634 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:17:39,634 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:17:39,635 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:17:39,635 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:17:39,635 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:17:39,635 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:17:39,635 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:17:39,635 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:17:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:17:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:17:39,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:39,648 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:39,648 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-02 20:17:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:39,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833604397] [2021-05-02 20:17:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:17:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:39,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:17:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:39,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:17:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:17:39,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:39,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833604397] [2021-05-02 20:17:39,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833604397] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:17:39,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:17:39,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:17:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245659895] [2021-05-02 20:17:39,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:17:39,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:17:39,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:17:39,825 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:17:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:39,902 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-02 20:17:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:17:39,903 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 20:17:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:39,908 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:17:39,908 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 20:17:39,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:17:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 20:17:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 20:17:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:17:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 20:17:39,971 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 20:17:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:39,972 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 20:17:39,972 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:17:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 20:17:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:17:39,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:39,974 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:39,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:17:39,974 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-02 20:17:39,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:39,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968046620] [2021-05-02 20:17:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:40,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:17:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:40,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:17:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:17:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:17:40,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:40,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968046620] [2021-05-02 20:17:40,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968046620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:17:40,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:17:40,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:17:40,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920426015] [2021-05-02 20:17:40,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:17:40,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:17:40,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:17:40,144 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:17:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:40,274 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-02 20:17:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:17:40,274 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:17:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:40,276 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:17:40,276 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:17:40,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:17:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:17:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:17:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:17:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 20:17:40,289 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 20:17:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:40,289 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 20:17:40,290 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:17:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 20:17:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:17:40,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:40,293 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:40,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:17:40,297 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-02 20:17:40,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:40,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112105520] [2021-05-02 20:17:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:40,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:40,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204416868] [2021-05-02 20:17:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:17:40,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:40,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:17:40,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112105520] [2021-05-02 20:17:40,477 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204416868] [2021-05-02 20:17:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204416868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:40,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:40,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:17:40,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299843213] [2021-05-02 20:17:40,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:17:40,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:17:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:17:40,480 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:17:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:40,551 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-02 20:17:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:17:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 20:17:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:40,554 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:17:40,554 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:17:40,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:17:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:17:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 20:17:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:17:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 20:17:40,567 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 20:17:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:40,568 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 20:17:40,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:17:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 20:17:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:17:40,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:40,569 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:40,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:17:40,788 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:40,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-02 20:17:40,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:40,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196346082] [2021-05-02 20:17:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:40,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:40,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690617652] [2021-05-02 20:17:40,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:17:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:40,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:17:40,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:40,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196346082] [2021-05-02 20:17:40,995 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:40,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690617652] [2021-05-02 20:17:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690617652] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:17:40,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:17:40,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:17:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286728734] [2021-05-02 20:17:40,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:17:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:17:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:17:40,996 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:17:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:41,076 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-02 20:17:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:17:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:17:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:41,079 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:17:41,079 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:17:41,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:17:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:17:41,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 20:17:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:17:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 20:17:41,085 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 20:17:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:41,086 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 20:17:41,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:17:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 20:17:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:17:41,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:41,086 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:41,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:41,305 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-02 20:17:41,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:41,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486508615] [2021-05-02 20:17:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:41,313 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:41,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261886229] [2021-05-02 20:17:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:17:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:41,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:17:41,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:41,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486508615] [2021-05-02 20:17:41,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:41,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261886229] [2021-05-02 20:17:41,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261886229] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:17:41,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:17:41,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:17:41,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298011941] [2021-05-02 20:17:41,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:17:41,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:17:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:17:41,472 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:17:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:41,555 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-02 20:17:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:17:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 20:17:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:41,556 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:17:41,556 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:17:41,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:17:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:17:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:17:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:17:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 20:17:41,560 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 20:17:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:41,561 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 20:17:41,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:17:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 20:17:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:17:41,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:41,561 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:41,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:41,777 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-02 20:17:41,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:41,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251503790] [2021-05-02 20:17:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:41,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:41,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421891173] [2021-05-02 20:17:41,785 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 20:17:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:17:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:17:41,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251503790] [2021-05-02 20:17:41,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421891173] [2021-05-02 20:17:41,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421891173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:17:41,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:17:41,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:17:41,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113945389] [2021-05-02 20:17:41,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:17:41,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:41,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:17:41,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:17:41,871 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:17:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:41,893 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-02 20:17:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:17:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-02 20:17:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:41,894 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:17:41,894 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 20:17:41,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:17:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 20:17:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 20:17:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:17:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 20:17:41,899 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 20:17:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:41,899 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 20:17:41,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:17:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 20:17:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:17:41,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:41,900 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, 1, 1, 1, 1, 1] [2021-05-02 20:17:42,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:42,115 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:42,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-02 20:17:42,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:42,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901767100] [2021-05-02 20:17:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:42,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:42,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368565720] [2021-05-02 20:17:42,124 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 20:17:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:42,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:17:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:42,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:17:42,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901767100] [2021-05-02 20:17:42,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368565720] [2021-05-02 20:17:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368565720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:42,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:42,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:17:42,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430962207] [2021-05-02 20:17:42,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:17:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:42,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:17:42,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:17:42,229 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:17:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:42,257 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-02 20:17:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:17:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 20:17:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:42,258 INFO L225 Difference]: With dead ends: 99 [2021-05-02 20:17:42,258 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 20:17:42,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:17:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 20:17:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-02 20:17:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 20:17:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-02 20:17:42,263 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-02 20:17:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:42,264 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-02 20:17:42,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:17:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-02 20:17:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:17:42,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:42,264 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:42,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 20:17:42,480 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-02 20:17:42,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:42,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544947278] [2021-05-02 20:17:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:42,494 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:42,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009675104] [2021-05-02 20:17:42,494 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 20:17:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:42,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:17:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:42,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:17:42,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544947278] [2021-05-02 20:17:42,622 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009675104] [2021-05-02 20:17:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009675104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:42,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:42,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:17:42,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978541675] [2021-05-02 20:17:42,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:17:42,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:42,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:17:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:17:42,625 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:17:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:42,669 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-02 20:17:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:17:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-02 20:17:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:42,670 INFO L225 Difference]: With dead ends: 104 [2021-05-02 20:17:42,670 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 20:17:42,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:17:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 20:17:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 20:17:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:17:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-02 20:17:42,697 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-02 20:17:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:42,697 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-02 20:17:42,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:17:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-02 20:17:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:17:42,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:42,698 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:42,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:42,913 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:42,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-02 20:17:42,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:42,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986882131] [2021-05-02 20:17:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:42,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:42,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576270936] [2021-05-02 20:17:42,920 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 [2021-05-02 20:17:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:17:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:43,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:17:43,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986882131] [2021-05-02 20:17:43,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576270936] [2021-05-02 20:17:43,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576270936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:43,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:43,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:17:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240503307] [2021-05-02 20:17:43,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:17:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:17:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:17:43,087 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:17:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:43,185 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-02 20:17:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:17:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 20:17:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:43,186 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:17:43,186 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 20:17:43,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:17:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 20:17:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-02 20:17:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:17:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-02 20:17:43,200 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-02 20:17:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:43,201 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-02 20:17:43,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:17:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-02 20:17:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:17:43,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:43,201 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:43,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:43,413 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-02 20:17:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:43,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941277480] [2021-05-02 20:17:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:43,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:43,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192904258] [2021-05-02 20:17:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:17:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:17:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:43,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:17:43,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:43,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941277480] [2021-05-02 20:17:43,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:43,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192904258] [2021-05-02 20:17:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192904258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:43,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:43,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:17:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511305777] [2021-05-02 20:17:43,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:17:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:17:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:17:43,579 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:17:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:43,748 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-02 20:17:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:17:43,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 20:17:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:43,749 INFO L225 Difference]: With dead ends: 129 [2021-05-02 20:17:43,749 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 20:17:43,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:17:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 20:17:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-02 20:17:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 20:17:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-02 20:17:43,755 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-02 20:17:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:43,755 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-02 20:17:43,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:17:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-02 20:17:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:17:43,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:43,756 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:43,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:17:43,973 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-02 20:17:43,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:43,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112187903] [2021-05-02 20:17:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:43,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:43,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300249667] [2021-05-02 20:17:43,979 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 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 20:17:44,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:17:44,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:17:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 20:17:44,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:44,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112187903] [2021-05-02 20:17:44,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:44,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300249667] [2021-05-02 20:17:44,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300249667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:44,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:44,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:17:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852353629] [2021-05-02 20:17:44,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:17:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:17:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:17:44,177 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:17:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:44,273 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-02 20:17:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:17:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-05-02 20:17:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:44,277 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:17:44,277 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 20:17:44,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:17:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 20:17:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 20:17:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 20:17:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-02 20:17:44,285 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-02 20:17:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:44,285 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-02 20:17:44,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:17:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-02 20:17:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:17:44,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:44,286 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:17:44,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:44,500 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-02 20:17:44,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:44,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563183913] [2021-05-02 20:17:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:44,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:44,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176418743] [2021-05-02 20:17:44,506 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 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 20:17:44,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:17:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 20:17:44,559 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:17:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:17:44,575 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:17:44,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:17:44,616 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:17:44,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:44,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:17:44 BasicIcfg [2021-05-02 20:17:44,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:17:44,862 INFO L168 Benchmark]: Toolchain (without parser) took 5662.35 ms. Allocated memory was 170.9 MB in the beginning and 245.4 MB in the end (delta: 74.4 MB). Free memory was 136.0 MB in the beginning and 109.5 MB in the end (delta: 26.6 MB). Peak memory consumption was 101.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:17:44,862 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 170.9 MB. Free memory is still 152.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:17:44,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.44 ms. Allocated memory is still 170.9 MB. Free memory was 135.9 MB in the beginning and 154.2 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:17:44,862 INFO L168 Benchmark]: Boogie Preprocessor took 19.97 ms. Allocated memory is still 170.9 MB. Free memory was 154.2 MB in the beginning and 152.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:17:44,862 INFO L168 Benchmark]: RCFGBuilder took 189.73 ms. Allocated memory is still 170.9 MB. Free memory was 152.6 MB in the beginning and 136.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:17:44,862 INFO L168 Benchmark]: IcfgTransformer took 13.79 ms. Allocated memory is still 170.9 MB. Free memory was 136.9 MB in the beginning and 135.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:17:44,862 INFO L168 Benchmark]: TraceAbstraction took 5257.47 ms. Allocated memory was 170.9 MB in the beginning and 245.4 MB in the end (delta: 74.4 MB). Free memory was 135.3 MB in the beginning and 109.5 MB in the end (delta: 25.8 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:17:44,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 170.9 MB. Free memory is still 152.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 177.44 ms. Allocated memory is still 170.9 MB. Free memory was 135.9 MB in the beginning and 154.2 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.97 ms. Allocated memory is still 170.9 MB. Free memory was 154.2 MB in the beginning and 152.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 189.73 ms. Allocated memory is still 170.9 MB. Free memory was 152.6 MB in the beginning and 136.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.79 ms. Allocated memory is still 170.9 MB. Free memory was 136.9 MB in the beginning and 135.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5257.47 ms. Allocated memory was 170.9 MB in the beginning and 245.4 MB in the end (delta: 74.4 MB). Free memory was 135.3 MB in the beginning and 109.5 MB in the end (delta: 25.8 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=11, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=4, b=1, counter=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=4, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5198.7ms, OverallIterations: 12, TraceHistogramMax: 7, EmptinessCheckTime: 14.8ms, AutomataDifference: 942.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 413 SDtfs, 204 SDslu, 1390 SDs, 0 SdLazy, 973 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 545.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 378 GetRequests, 301 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 388.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=11, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 114.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 23 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 75.0ms SsaConstructionTime, 245.0ms SatisfiabilityAnalysisTime, 1132.1ms InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 1412 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1478 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 204/236 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...