/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/ps3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:11:08,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:11:08,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:11:08,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:11:08,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:11:08,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:11:08,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:11:08,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:11:08,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:11:08,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:11:08,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:11:08,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:11:08,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:11:08,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:11:08,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:11:08,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:11:08,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:11:08,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:11:08,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:11:08,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:11:08,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:11:08,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:11:08,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:11:08,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:11:08,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:11:08,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:11:08,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:11:08,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:11:08,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:11:08,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:11:08,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:11:08,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:11:08,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:11:08,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:11:08,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:11:08,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:11:08,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:11:08,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:11:08,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:11:08,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:11:08,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:11:08,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:11:08,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:11:08,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:11:08,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:11:08,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:11:08,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:11:08,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:11:08,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:11:08,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:11:08,741 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:11:08,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:11:08,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:11:08,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:11:08,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:11:08,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:11:08,996 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:11:08,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound10.c [2021-05-02 22:11:09,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6188699c/b6d8220523184692af3634d122c15bb7/FLAGb1d886d9a [2021-05-02 22:11:09,441 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:11:09,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound10.c [2021-05-02 22:11:09,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6188699c/b6d8220523184692af3634d122c15bb7/FLAGb1d886d9a [2021-05-02 22:11:09,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6188699c/b6d8220523184692af3634d122c15bb7 [2021-05-02 22:11:09,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:11:09,814 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:11:09,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:11:09,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:11:09,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:11:09,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:09,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4103a06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09, skipping insertion in model container [2021-05-02 22:11:09,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:09,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:11:09,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:11:09,930 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/ps3-ll_valuebound10.c[458,471] [2021-05-02 22:11:09,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:11:09,942 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:11:09,987 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/ps3-ll_valuebound10.c[458,471] [2021-05-02 22:11:09,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:11:09,999 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:11:09,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09 WrapperNode [2021-05-02 22:11:09,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:11:10,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:11:10,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:11:10,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:11:10,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:10,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:10,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:10,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:10,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:10,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:10,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (1/1) ... [2021-05-02 22:11:10,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:11:10,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:11:10,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:11:10,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:11:10,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (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 22:11:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:11:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:11:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:11:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:11:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:11:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:11:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:11:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:11:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:11:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:11:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:11:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:11:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:11:10,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:11:10,277 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:11:10,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:11:10 BoogieIcfgContainer [2021-05-02 22:11:10,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:11:10,279 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:11:10,279 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:11:10,279 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:11:10,281 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:11:10" (1/1) ... [2021-05-02 22:11:10,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:11:10 BasicIcfg [2021-05-02 22:11:10,292 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:11:10,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:11:10,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:11:10,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:11:10,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:11:09" (1/4) ... [2021-05-02 22:11:10,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781368d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:11:10, skipping insertion in model container [2021-05-02 22:11:10,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:09" (2/4) ... [2021-05-02 22:11:10,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781368d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:11:10, skipping insertion in model container [2021-05-02 22:11:10,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:11:10" (3/4) ... [2021-05-02 22:11:10,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781368d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:11:10, skipping insertion in model container [2021-05-02 22:11:10,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:11:10" (4/4) ... [2021-05-02 22:11:10,296 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_valuebound10.cJordan [2021-05-02 22:11:10,302 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:11:10,304 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:11:10,321 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:11:10,345 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:11:10,345 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:11:10,345 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:11:10,346 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:11:10,346 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:11:10,346 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:11:10,346 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:11:10,346 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:11:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:11:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:11:10,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:10,360 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:10,360 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-02 22:11:10,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:10,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314711927] [2021-05-02 22:11:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:10,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:11:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:10,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:11:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:11:10,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:10,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314711927] [2021-05-02 22:11:10,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314711927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:11:10,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:11:10,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:11:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328124618] [2021-05-02 22:11:10,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:11:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:10,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:11:10,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:11:10,588 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:10,631 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 22:11:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:11:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:11:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:10,637 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:11:10,637 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:11:10,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:11:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:11:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 22:11:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:11:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 22:11:10,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-02 22:11:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:10,658 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 22:11:10,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 22:11:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:11:10,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:10,659 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:10,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:11:10,659 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:10,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-02 22:11:10,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:10,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152073347] [2021-05-02 22:11:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:10,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:11:10,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898971154] [2021-05-02 22:11:10,683 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 22:11:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:11:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:11:10,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:11:10,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152073347] [2021-05-02 22:11:10,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:11:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898971154] [2021-05-02 22:11:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898971154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:11:10,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:11:10,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:11:10,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084582957] [2021-05-02 22:11:10,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:11:10,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:11:10,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:11:10,865 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:10,927 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 22:11:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:11:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:11:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:10,928 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:11:10,928 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 22:11:10,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:11:10,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 22:11:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 22:11:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:11:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 22:11:10,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-02 22:11:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:10,932 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 22:11:10,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 22:11:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 22:11:10,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:10,933 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, 1] [2021-05-02 22:11:11,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:11:11,140 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:11,140 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-02 22:11:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:11,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470937736] [2021-05-02 22:11:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:11,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:11:11,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146136012] [2021-05-02 22:11:11,149 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 22:11:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:11,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:11:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:11:11,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:11:11,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:11,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470937736] [2021-05-02 22:11:11,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:11:11,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146136012] [2021-05-02 22:11:11,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146136012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:11:11,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:11:11,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:11:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394036448] [2021-05-02 22:11:11,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:11:11,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:11,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:11:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:11:11,305 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:11:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:11,363 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-02 22:11:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:11:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 22:11:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:11,364 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:11:11,364 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:11:11,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:11:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:11:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:11:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:11:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 22:11:11,370 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-02 22:11:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:11,371 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 22:11:11,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:11:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 22:11:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 22:11:11,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:11,372 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:11,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:11:11,572 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-02 22:11:11,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:11,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528257019] [2021-05-02 22:11:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:11,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:11:11,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884185857] [2021-05-02 22:11:11,596 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 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 22:11:11,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:11:11,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:11:11,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 22:11:11,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:11:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:11:11,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:11,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528257019] [2021-05-02 22:11:11,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:11:11,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884185857] [2021-05-02 22:11:11,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884185857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:11:11,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:11:11,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:11:11,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441814707] [2021-05-02 22:11:11,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:11:11,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:11:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:11:11,778 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:11:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:11,853 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 22:11:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:11:11,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 22:11:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:11,856 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:11:11,856 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:11:11,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:11:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:11:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:11:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:11:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 22:11:11,873 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-05-02 22:11:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:11,873 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 22:11:11,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:11:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 22:11:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 22:11:11,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:11,874 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:12,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:11:12,085 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1704072427, now seen corresponding path program 3 times [2021-05-02 22:11:12,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:12,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585674905] [2021-05-02 22:11:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:12,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:11:12,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267282593] [2021-05-02 22:11:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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