/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/fermat2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:41:08,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:41:08,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:41:08,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:41:08,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:41:08,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:41:08,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:41:08,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:41:08,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:41:08,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:41:08,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:41:08,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:41:08,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:41:08,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:41:08,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:41:08,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:41:08,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:41:08,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:41:08,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:41:08,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:41:08,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:41:08,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:41:08,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:41:08,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:41:08,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:41:08,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:41:08,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:41:08,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:41:08,723 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:41:08,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:41:08,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:41:08,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:41:08,739 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:41:08,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:41:08,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:41:08,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:41:08,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:41:08,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:41:08,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:41:08,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:41:08,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:41:08,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:41:08,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:41:08,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:41:08,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:41:08,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:41:08,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:41:08,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:41:08,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:41:08,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:41:08,744 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:41:08,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:41:09,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:41:09,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:41:09,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:41:09,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:41:09,111 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:41:09,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-05-02 20:41:09,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba37c81f/5b26dd2469a34eee8c67b3fc32343886/FLAGf6beec073 [2021-05-02 20:41:09,578 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:41:09,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-05-02 20:41:09,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba37c81f/5b26dd2469a34eee8c67b3fc32343886/FLAGf6beec073 [2021-05-02 20:41:09,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba37c81f/5b26dd2469a34eee8c67b3fc32343886 [2021-05-02 20:41:09,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:41:09,986 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:41:09,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:41:09,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:41:09,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:41:09,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:41:09" (1/1) ... [2021-05-02 20:41:09,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ffb27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:09, skipping insertion in model container [2021-05-02 20:41:09,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:41:09" (1/1) ... [2021-05-02 20:41:09,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:41:10,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:41:10,106 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/fermat2-ll_unwindbound2.c[524,537] [2021-05-02 20:41:10,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:41:10,129 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:41:10,151 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/fermat2-ll_unwindbound2.c[524,537] [2021-05-02 20:41:10,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:41:10,197 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:41:10,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10 WrapperNode [2021-05-02 20:41:10,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:41:10,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:41:10,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:41:10,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:41:10,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:41:10,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:41:10,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:41:10,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:41:10,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:41:10,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:41:10,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:41:10,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:41:10,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:41:10,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:41:10,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:41:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:41:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:41:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:41:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:41:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:41:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:41:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:41:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:41:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:41:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:41:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:41:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:41:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:41:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:41:10,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:41:10,531 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:41:10,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:41:10 BoogieIcfgContainer [2021-05-02 20:41:10,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:41:10,533 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:41:10,533 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:41:10,534 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:41:10,536 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:41:10" (1/1) ... [2021-05-02 20:41:10,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:41:10 BasicIcfg [2021-05-02 20:41:10,550 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:41:10,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:41:10,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:41:10,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:41:10,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:41:09" (1/4) ... [2021-05-02 20:41:10,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a11668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:41:10, skipping insertion in model container [2021-05-02 20:41:10,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:10" (2/4) ... [2021-05-02 20:41:10,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a11668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:41:10, skipping insertion in model container [2021-05-02 20:41:10,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:41:10" (3/4) ... [2021-05-02 20:41:10,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a11668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:41:10, skipping insertion in model container [2021-05-02 20:41:10,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:41:10" (4/4) ... [2021-05-02 20:41:10,556 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound2.cJordan [2021-05-02 20:41:10,559 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:41:10,562 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:41:10,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:41:10,590 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:41:10,591 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:41:10,591 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:41:10,591 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:41:10,591 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:41:10,591 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:41:10,591 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:41:10,591 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:41:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:41:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:41:10,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:10,608 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 20:41:10,608 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:10,612 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 20:41:10,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:10,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899293852] [2021-05-02 20:41:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:10,782 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:10,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501762971] [2021-05-02 20:41:10,783 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 20:41:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:10,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:41:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:41:10,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:10,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899293852] [2021-05-02 20:41:10,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501762971] [2021-05-02 20:41:10,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501762971] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:41:10,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:41:10,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:41:10,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550403155] [2021-05-02 20:41:10,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:41:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:41:11,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:41:11,003 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 20:41:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:11,020 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 20:41:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:41:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 22 [2021-05-02 20:41:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:11,028 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:41:11,028 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:41:11,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:41:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:41:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:41:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:41:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 20:41:11,058 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 20:41:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:11,058 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 20:41:11,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 20:41:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 20:41:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:41:11,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:11,060 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 20:41:11,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:41:11,283 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 20:41:11,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:11,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469266327] [2021-05-02 20:41:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:11,305 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199669627] [2021-05-02 20:41:11,305 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 20:41:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:41:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:11,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:11,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:11,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:11,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:11,520 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 20:41:11,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:11,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469266327] [2021-05-02 20:41:11,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:11,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199669627] [2021-05-02 20:41:11,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199669627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:41:11,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:41:11,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:41:11,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802462012] [2021-05-02 20:41:11,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:41:11,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:11,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:41:11,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:41:11,524 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:11,535 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 20:41:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:41:11,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:41:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:11,537 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:41:11,537 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:41:11,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:41:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:41:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:41:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:41:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 20:41:11,542 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 20:41:11,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:11,543 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 20:41:11,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 20:41:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:41:11,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:11,544 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 20:41:11,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:11,768 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 20:41:11,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:11,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534758353] [2021-05-02 20:41:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:11,782 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:11,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180886003] [2021-05-02 20:41:11,783 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 20:41:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:41:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:11,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:11,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:12,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:12,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:12,058 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 20:41:12,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:12,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534758353] [2021-05-02 20:41:12,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:12,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180886003] [2021-05-02 20:41:12,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180886003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:12,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:12,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:41:12,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128766102] [2021-05-02 20:41:12,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:41:12,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:41:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:41:12,060 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 20:41:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:16,240 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 20:41:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:41:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 23 [2021-05-02 20:41:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:16,242 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:41:16,242 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:41:16,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:41:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:41:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 20:41:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:41:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:41:16,248 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:41:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:16,248 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:41:16,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 20:41:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:41:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:41:16,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:16,250 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, 1] [2021-05-02 20:41:16,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:16,465 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 20:41:16,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:16,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039891709] [2021-05-02 20:41:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:16,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:16,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718077633] [2021-05-02 20:41:16,476 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 20:41:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:16,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:41:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:16,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:16,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:17,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:17,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:17,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:17,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:41:17,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:17,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039891709] [2021-05-02 20:41:17,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:17,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718077633] [2021-05-02 20:41:17,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718077633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:17,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:17,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:41:17,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271128902] [2021-05-02 20:41:17,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:41:17,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:41:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:41:17,652 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:41:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:36,872 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-05-02 20:41:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:41:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:41:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:36,874 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:41:36,874 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:41:36,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 935.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:41:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:41:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 20:41:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:41:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:41:36,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2021-05-02 20:41:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:36,879 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:41:36,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:41:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:41:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:41:36,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:36,881 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-05-02 20:41:37,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:37,085 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 20:41:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:37,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400198476] [2021-05-02 20:41:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:37,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:37,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633437042] [2021-05-02 20:41:37,095 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 20:41:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:41:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:37,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:41:37,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:37,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400198476] [2021-05-02 20:41:37,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:37,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633437042] [2021-05-02 20:41:37,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633437042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:37,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:37,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:41:37,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309560063] [2021-05-02 20:41:37,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:41:37,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:41:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:41:37,231 INFO L87 Difference]: Start difference. First operand 37 states and 44 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:41:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:37,262 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:41:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:41:37,263 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:41:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:37,264 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:41:37,264 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:41:37,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:41:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:41:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:41:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:41:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-05-02 20:41:37,269 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2021-05-02 20:41:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:37,269 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-05-02 20:41:37,269 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:41:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-05-02 20:41:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:41:37,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:37,270 INFO L523 BasicCegarLoop]: trace histogram [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 20:41:37,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:37,477 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1670019071, now seen corresponding path program 1 times [2021-05-02 20:41:37,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:37,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381766269] [2021-05-02 20:41:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:37,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:37,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774719084] [2021-05-02 20:41:37,487 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 20:41:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:41:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:37,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:41:37,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381766269] [2021-05-02 20:41:37,807 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:37,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774719084] [2021-05-02 20:41:37,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774719084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:37,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:37,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:41:37,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993155157] [2021-05-02 20:41:37,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:41:37,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:41:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:41:37,809 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:41:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:46,975 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-02 20:41:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:41:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:41:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:46,976 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:41:46,976 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:41:46,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:41:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:41:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 20:41:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:41:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-05-02 20:41:46,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 32 [2021-05-02 20:41:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:46,982 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-05-02 20:41:46,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:41:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-05-02 20:41:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:41:46,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:46,983 INFO L523 BasicCegarLoop]: trace histogram [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 20:41:47,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:47,193 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1737444544, now seen corresponding path program 1 times [2021-05-02 20:41:47,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:47,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350780201] [2021-05-02 20:41:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:47,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:47,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110397279] [2021-05-02 20:41:47,200 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 20:41:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:41:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:47,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:47,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:47,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:47,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,934 WARN L205 SmtUtils]: Spent 16.46 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:42:40,526 WARN L205 SmtUtils]: Spent 17.26 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 20:42:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:42:40,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350780201] [2021-05-02 20:42:40,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110397279] [2021-05-02 20:42:40,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110397279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:40,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:40,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:42:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930943541] [2021-05-02 20:42:40,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:42:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:40,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:42:40,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 20:42:40,633 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:43:51,041 WARN L205 SmtUtils]: Spent 15.91 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:44:47,070 WARN L205 SmtUtils]: Spent 34.43 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 20:45:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:20,235 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 20:45:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:45:20,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:45:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:20,237 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:45:20,237 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:45:20,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 127360.4ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 20:45:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:45:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-02 20:45:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:45:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-05-02 20:45:20,242 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 32 [2021-05-02 20:45:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:20,242 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-05-02 20:45:20,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:45:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-05-02 20:45:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:45:20,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:20,243 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-05-02 20:45:20,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:20,444 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1427724253, now seen corresponding path program 1 times [2021-05-02 20:45:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498591851] [2021-05-02 20:45:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:20,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:20,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233396396] [2021-05-02 20:45:20,455 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 20:45:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:45:20,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:20,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:20,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:20,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:45:20,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498591851] [2021-05-02 20:45:20,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233396396] [2021-05-02 20:45:20,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233396396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:20,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:20,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:45:20,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636752405] [2021-05-02 20:45:20,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:45:20,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:45:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:45:20,658 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:45:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:26,931 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-02 20:45:26,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:45:26,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:45:26,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:26,933 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:45:26,933 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:45:26,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:45:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:45:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-05-02 20:45:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:45:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-05-02 20:45:26,938 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 38 [2021-05-02 20:45:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:26,938 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-05-02 20:45:26,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:45:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-05-02 20:45:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:45:26,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:26,939 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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 20:45:27,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:45:27,149 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:27,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-02 20:45:27,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:27,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872766046] [2021-05-02 20:45:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:27,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:27,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911466460] [2021-05-02 20:45:27,158 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 20:45:27,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:45:27,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 20:45:27,222 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:45:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:45:27,260 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:45:27,304 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:45:27,304 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:45:27,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:27,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:45:27 BasicIcfg [2021-05-02 20:45:27,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:45:27,538 INFO L168 Benchmark]: Toolchain (without parser) took 257552.88 ms. Allocated memory was 220.2 MB in the beginning and 264.2 MB in the end (delta: 44.0 MB). Free memory was 184.8 MB in the beginning and 152.3 MB in the end (delta: 32.5 MB). Peak memory consumption was 76.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:27,538 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 220.2 MB. Free memory is still 201.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:45:27,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.03 ms. Allocated memory is still 220.2 MB. Free memory was 184.6 MB in the beginning and 203.2 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:27,539 INFO L168 Benchmark]: Boogie Preprocessor took 34.48 ms. Allocated memory is still 220.2 MB. Free memory was 203.2 MB in the beginning and 201.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:27,539 INFO L168 Benchmark]: RCFGBuilder took 298.08 ms. Allocated memory is still 220.2 MB. Free memory was 201.4 MB in the beginning and 186.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:27,539 INFO L168 Benchmark]: IcfgTransformer took 16.59 ms. Allocated memory is still 220.2 MB. Free memory was 186.7 MB in the beginning and 185.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:27,539 INFO L168 Benchmark]: TraceAbstraction took 256986.94 ms. Allocated memory was 220.2 MB in the beginning and 264.2 MB in the end (delta: 44.0 MB). Free memory was 185.0 MB in the beginning and 152.3 MB in the end (delta: 32.7 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:27,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 220.2 MB. Free memory is still 201.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.03 ms. Allocated memory is still 220.2 MB. Free memory was 184.6 MB in the beginning and 203.2 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.48 ms. Allocated memory is still 220.2 MB. Free memory was 203.2 MB in the beginning and 201.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 298.08 ms. Allocated memory is still 220.2 MB. Free memory was 201.4 MB in the beginning and 186.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.59 ms. Allocated memory is still 220.2 MB. Free memory was 186.7 MB in the beginning and 185.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 256986.94 ms. Allocated memory was 220.2 MB in the beginning and 264.2 MB in the end (delta: 44.0 MB). Free memory was 185.0 MB in the beginning and 152.3 MB in the end (delta: 32.7 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=18, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(counter)=0, A=7, counter=0, R=3] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=3] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, R=3, r=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, R=3, r=2, u=7, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=1, r=2, R=3, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, r=2, R=3, u=7, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=7, counter=1, R=3, r=1, u=7, v=3] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, R=3, r=1, u=7, v=3] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=2, r=1, R=3, u=7, v=3] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=2, r=1, R=3, u=7, v=3] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=7, counter=2, r=-2, R=3, u=7, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=3, counter++=2, R=3, r=-2, u=7, v=5] [L34] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 256916.6ms, OverallIterations: 9, TraceHistogramMax: 3, EmptinessCheckTime: 14.4ms, AutomataDifference: 198546.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 206 SDtfs, 109 SDslu, 918 SDs, 0 SdLazy, 668 SolverSat, 28 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 123661.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 128669.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=8, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 103.4ms SsaConstructionTime, 309.8ms SatisfiabilityAnalysisTime, 55325.5ms InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 223 ConstructedInterpolants, 17 QuantifiedInterpolants, 1514 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1114 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 32/60 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...